List of environment topics
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0-9
- 1970 Ancash earthquake
- 2000 Atlantic hurricane season
- (2000 California electricity crisis: see) California electricity crisis
- 2000 in science
- 2000 Pacific hurricane season
- 2001 anthrax attacks
- 2001 Atlantic hurricane season
- 2001 Gujarat Earthquake (in India)
- 2001 in science
- 2001 Pacific hurricane season
- 2001 UK foot and mouth crisis
- 2002 Atlantic hurricane season
- 2002 Dudley earthquake (in the UK)
- 2002 European floods
- 2002 in science
- 2002 Pacific hurricane season
- 2003 Atlantic hurricane season
- (2003 Canberra bushfires) Canberra bushfires of 2003 (in Australia)
- 2003 in science
- 2003 North America blackout
- 2003 Okanagan Mountain Park Fire (in British Columbia in Canada)
- 2003 Pacific hurricane season
- 2004 Atlantic hurricane season
- 2004 Chuetsu Earthquake (in Japan)
- (2004 desert locust swarm: see) desert locust
- (2004 energy crisis: see) oil price increases of 2004 and 2005
- 2004 in science
- 2004 Indian Ocean earthquake
- (2004 oil crisis in Nigeria: see) Nigerian Oil Crisis
- 2004 Pacific hurricane season
- 2004 Pacific typhoon season
- 2004 volcanic activity of Mount St. Helens
- 2004-05 Southern Hemisphere Tropical Cyclone Season
- 2005 Atlantic hurricane season
- 2005 European floods
- 2005 Fukuoka earthquake (in Japan)
- 2005 Gujarat Flood (in India)
- 2005 in science
- 2005 Indonesian embassy bioterrorism hoax
- 2005 Java-Bali Blackout
- 2005 Kashmir earthquake (2005 Northern Pakistan earthquake) (2005 South Asia earthquake)
- (2005 London bombings: see) July 2005 London bombings
- 2005 Maharashtra floods (see same for "2005 Mumbai floods")
- 2005 Miyagi earthquake
- 2005 Pacific hurricane season
- 2005 Pacific typhoon season
- 2005 Sumatran earthquake (in Indonesia)
- 2005 Sunjiawan mine disaster (in the People's Republic of China)
- 2005 Zarand earthquake (in Iran)
- 2005-06 Southern Hemisphere tropical cyclone season
A
- acid rain
- adaptive management
- Agenda 21 (a UN plan of action)
- agribusiness
- Air Quality Index (AQI)
- allergen
- alternative biochemistry
- antibiotic resistance
- appropriate technology
- arable land
- atomic energy
- avian influenza (bird flu) (avian flu) (influenzavirus A) (type A flu) (genus A flu)
B
- back to the land
- Bhopal disaster (in 1984)
- bioaccumulation
- biodegradability prediction
- biodegradation
- biodiversity (biological diversity)
- biological cybernetics
- biological warfare (germ warfare)
- bionics (biomimetics) (biognosis) (biomimicry)
- biopiracy
- bioprospecting
- Bioregional revolution
- bioremediation
- biotechnology
- bottom fishing
- Buffalo Commons
- bulk mail (junk mail)
- by-catch
C
- Canadian Food Inspection Agency (CFIA)
- chemical warfare
- chemtrail theory
- ciguatera (a foodborne illness poisoning)
- clearfelling (clearcutting)
- climate change
- Community bicycle program
- compost
- conservationist
- conservation biology
- conservation ethic
- conservation movement
- consumerism
- contrail (condensation trail) (vapor trail)
- cyclone
D
- defoliant
- deforestation
- desertification
- Dictionary of the Environment (book)
- discarded drugs
- disease
- drainage system
- dredging
- driftnet fishing
- drought
- drug production waste
E
- e-waste (electronic waste)
- Earth Day
- earth's energy budget
- ecocide
- ecohydrology
- ecotage
- eco-terrorism
- Ecotopia: The Notebooks and Reports of William Weston (book)
- ecotourism
- ecovillage
- edge effect
- effect of the 2004 Indian Ocean earthquake on Hong Kong
- effect of the 2004 Indian Ocean earthquake on India
- effect of the 2004 Indian Ocean earthquake on Indonesia
- effect of the 2004 Indian Ocean earthquake on Malaysia
- effect of the 2004 Indian Ocean earthquake on Myanmar
- effect of the 2004 Indian Ocean earthquake on Norway
- effect of the 2004 Indian Ocean earthquake on Somalia
- effect of the 2004 Indian Ocean earthquake on Sri Lanka
- effect of the 2004 Indian Ocean earthquake on Thailand
- effect of the 2004 Indian Ocean earthquake on the Maldives
- electromagnetic fields
- energy conservation
- energy development
- environmental design
- environmental education
- environmental health
- environmental journalism
- environmental law
- environmental movement
- environmental restoration
- environmental skepticism
- environmentalism
- environmentalist
- ergonomics
- eutrophication
- Evansville Tornado of November 2005
- excreted drugs
- excretion
- exploration logging
- exurb
F
- factory farming
- Federal Emergency Management Agency of the United States (FEMA)
- fire
- fixed-wing aircraft (aeroplane[s]) (airplane[s])
- flood
- flotsam and jetsam
- fish emulsion
- fish farming (a form of aquaculture)
- fishing industry
- fluorescent lamp
- food additive
- food chain (see same for "food web" and for "food network")
- food inspection
- food irradiation
- Food Safety Inspection Service (in the US)
- forestry
- formation of rocks
- fuel cell
- full-spectrum lighting
- fungicide
- future energy development
G
- game fish
- geodesic dome
- geothermal power
- global dimming
- global economic monoculture
- global political monoculture
- global warming
- (GMO) genetically modified organism
- gnat (see "greenhouses")
- gnatcatcher (and gnatwren) (birds)
- gnateater (bird)
- gnomon (part of a sundial)
- Gobi Desert (in the People's Republic of China)
- Goiânia accident (in Brazil)
- gold (see under Precautions)
- gold extraction (see under Leachimg and under Mercury removal)
- gold mining
- gold prospecting (see "pollution")
- Gold Prospectors Association of America
- Gold Reserve Act (of 1934, in the US)
- gold rush
- (Gold Rush of 1849) California Gold Rush
- gold rush tools and methods
- gold synthesis
- Golden Field Guide (any of a series of 12 books)
- Golden Quadrilateral (GQ) (in India)
- Golden State Freeway (in California in the US) (see under Earthquakes and the Golden State Freeway)
- Goldman Environmental Prize
- golf course (see under Environmental impact)
- gondola
- gondola (rail)
- gondola lift (cable car)
- Good Agricultural Practices (GAPs) (as defined by the FAO of the UN)
- Good Friday Earthquake (Great Alaska Earthquake) (in 1964)
- Good Neighbor policy (military restraint)
- (good substitution: see) substitute good (an economics topic with environmental relevance)
- Google Earth (a free virtual globe)
- Google Maps
- Gore-Tex
- (grade crossing) level crossing (railroad crossing) (see "catastrophic risk" under Safety)
- graded road
- Grain Belt (in the US)
- grain crimping (see "dustless" and see "diseases" under Description)
- grain elevator (see "genetically modified" and see "explosions")
- Grand Canal of China
- Grand Canal of Ireland
- Grand Canal of Venice (in Italy)
- Grand Canyon (in Arizona in the US) (see under Geography and under Geology)
- Grand Divide (in Missouri in the US)
- Grand Union Canal (in England)
- graphite bomb
- grass
- grass-fed beef
- grasshopper (see under Locusts)
- grassland (a type of biome)
- (graveyard) cemetery
- Graveyard of the Atlantic (by the east coast of the US)
- gravity bomb
- (gravity dam: see under) Gravity dams
- gravity railroad
- Gravity Recovery and Climate Experiment (GRACE)
- (gray goo) grey goo
- (gray water) greywater
- Gray Whale
- grazier (Australian rancher)
- grazing
- (grazing management: see) ranching
- (Great Alaska Earthquake) Good Friday Earthquake (in 1964)
- "Great American Desert"
- Great American Smokeout
- (Great Atlantic Hurricane of 1944) 1944 Great Atlantic Hurricane
- Great Australian Bight Marine National Park
- Great Baltimore Fire (in 1904)
- Great Barrier Reef (by Australia)
- Great Barrier Reef Marine Park
- Great Basin (in the US) (see same for "Great Basin Desert")
- Great Bear Lake (in northern Canada)
- Great Bear Wilderness (in Montana in the US)
- Great Black Swamp (Black Swamp) (in Ohio and Indiana, in the US)
- Great Blizzard of '88 (in 1888, in the US)
- Great Blizzard of 1899 (in the US)
- Great Blizzard of 1978 (in Great Lakes region)
- (Great Blizzard of 1993) 1993 North American Storm Complex ('93 Superstorm) (Storm of the century)
- Great Blizzard Subtropical Derecho (in 1993)
- Great Boston Fire of 1872
- Great Chicago Fire (in 1871)
- Great Chilean Earthquake (in 1960)
- great circle (see "great circle paths")
- Great Colonial Hurricane of 1635 (in New England)
- (Great Comet of 1811) C/1811 F1
- (Great Comet of 1843) C/1843 D1
- (Great Comet of 1861) C/1861 J1
- Great Comet of 1882 (C/1882 R1)
- Great Daylight Comet of 1910
- Great Dismal Swamp (in the eastern US)
- Great Dismal Swamp National Wildlife Refuge
- (Great Divide) Continental Divide (in North America)
- Great Divide Basin (Great Divide Closed Basin) (in Wyoming in the US)
- Great Divide Mountain Bike Route (in North America)
- Great Dividing Range (in Australia)
- Great Famine (disambiguation)
- Great Famine of 1315-1317 (in Europe)
- (Great Fire: see) list of historic fires
- Great Fire of 1892 (in St. John's in Canada)
- Great Fire of 1901 (in Florida in the US)
- Great Fire of 1910 (Big Blowup) (Big Burn) (in northwestern US)
- Great Fire of London (in the UK, in 1666)
- Great Fire of New York (in 1835)
- Great Fire of Rome (in 64 AD)
- (Great Flood of 1889) Johnstown Flood (in Pennsylvania in the US)
- Great Flood of 1951 (in Kansas and Missouri, in the US)
- Great Flood of 1993 (in the US Midwest)
- (Great Flood of New Orleans: see) effect of Hurricane Katrina on New Orleans
- (Great Flu Epidemic) Spanish flu (Spanish Flu Pandemic) (La Grippe) (in 1918 and 1919)
- (Great Forest Fire of 1881) Thumb Fire (in Michigan in the US)
- (Great Galveston Hurricane) Galveston Hurricane of 1900 (in the US)
- Great Hanshin earthquake (in Japan in 1995)
- Great Himalayan National Park (in India)
- Great Hinckley Fire (in Minnesota in the US), in 1894)
- (Great Hunger) Irish Potato Famine (1845-1849)
- Great Hurricane of 1780 (in the Caribbean)
- (Great Hurricane of 1938) New England Hurricane of 1938
- (Great Influenza Pandemic) Spanish flu (in 1918 and 1919)
- Great Irish Famine (1740-1741)
- Great Kanto earthquake (in Japan, in 1923)
- (Great Lakes [Africa]) African Great Lakes
- Great Lakes (in North America)
- Great Lakes Commission
- Great Lakes Environmental Research Laboratory
- Great Lakes refugee crisis (in Africa) (see "diseases" under Emergency relief)
- Great Lakes Storm of 1913 (Big Blow) (Freshwater Fury)
- Great Lakes Transportation
- Great Lakes Waterway
- (Great Lone Pine earthquake) 1872 Lone Pine earthquake (in California in the US)
- (Great Mexican earthquake) 1985 Mexico City earthquake
- (Great Miami Hurricane) 1926 Miami Hurricane
- Great Mississippi Flood (in 1927)
- (Great Molasses Flood) Boston molasses disaster (in 1919)
- Great Natchez Tornado (in Mississippi, in 1840)
- (Great New England Hurricane) New England Hurricane of 1938
- Great Plague (Great Plague of London) (in Britain, in 1665-1666)
- (Great Plague of Milan) Italian Plague of 1629-1631
- Great Plague of Vienna (in 1679)
- Great Recycling and Northern Development Canal (proposed for James Bay in Canada)
- Great Rift Valley (from Syria to Mozambique) (see "volcano")
- Great Salem Fire of 1914 (in Massachusetts in the US)
- Great Sandy Desert (in Australia)
- Great Seattle Fire (in 1889)
- Great September Gale of 1815 (in New England in the US)
- Great Sheffield Flood (Great Inundation) (in England, in 1864)
- Great Slave Lake (in northern Canada)
- Great Smog of 1952 (in London)
- Great Storm of 1703 (in the British Isles)
- (Great Storm of 1913) Great Lakes Storm of 1913
- Great Storm of 1987 (in England)
- Great Tangshan earthquake (in China in 1976)
- Great Thumb Fire (in Michigan in the US, in 1881)
- (Great Tokyo earthquake) Great Kanto earthquake (in Japan, in 1923)
- (Great Toronto Fire) 1904 Toronto fire (in Ontario in Canada)
- Great train wreck of 1918 (in Tennessee in the US)
- Great Victoria Desert (in Australia)
- (great whale) right whale
- Greater Cleveland Regional Transit Authority (GCRTA) (in Ohio in the US)
- Greater Lafayette Public Transportation Corporation (GLPTC) (in Indiana in the US)
- Greater Richmond Transit of Richmond, Virginia (GRTC) (in the US)
- Greater Toronto Bioregion (in Ontario in Canada)
- (Greater Toronto Transit Authority [GTTA]) GO Transit
- (Greater Vancouver Transportation Authority) TransLink (Vancouver) (in Canada)
- Greater Yellowstone Ecosystem (in the US)
- Green Alliance (charity)
- Green Architecture
- green ban
- green belt
- Green Belt (UK)
- Green Belt Movement (a non-governmental organization)
- (green biotechnology: see) biotechnology
- green building
- Green Building (MIT) (the main building for the Department of Earth, Atmospheric, and Planetary Science)
- (green car: see) green vehicle
- green certificate (in Europe)
- green chemistry
- green computing
- Green Cruise (event)
- green design
- green economics
- green energy
- green fertilizer
- (green fuel: see) biofuel
- (Green Gear Cycling: see) Bike Friday (a brand of folding bicycle)
- Green Gross Domestic Product (Green GDP)
- green lane
- green lending
- green manure
- green money
- (green non-sulfur bacteria: see) Chloroflexi
- Green Revolution
- green roof
- (green space: see) green belt
- green sulfur bacteria ("environment must be oxygen-free")
- green syndicalism
- green tags
- green tax shift
- Green technology
- green vehicle
- (green water: see) maritime geography
- green wave (in road transport)
- Greencycles (?)
- greenery
- GreenFacts (international non-profit organization)
- greenhouse (glasshouse) (hothouse)
- greenhouse effect
- greenhouse gas (GHG)
- Greening Australia (conservation organization)
- Greening Earth Society (public relations organization)
- Greenland (see "climate" under Geography and "fishing" under Economy)
- (Greenland/Economy) economy of Greenland
- (Greenland/Geography) geography of Greenland
- (Greenland/Transportation) transportation in Greenland
- Greenland ice core project (GRIP)
- Greenland Ice Sheet (see under Possible effects of global warming)
- (greenmarket: see) farmers' market
- Greenpeace
- greenwash
- (grey biotechnology: see) biotechnology
- (grey body: see) black body (in physics)
- grey goo (gray goo)
- (Grey Whale) Gray Whale
- greywater
- grid connection
- grid energy storage
- gridlock
- Griffith's experiment (in genetics)
- grinder pump
- gristmill (see "powered")
- (grizzly bear: a subspecies of) Brown Bear
- (grocery store) supermarket (see "dependency on the motor car" under History) (see list of supermarkets)
- (Groenland) Greenland (see under Geography and under Economy)
- Gros Ventre landslide (in 1925)
- Gros Ventre Wilderness (in Wyoming in the US)
- Grose River (in Australia)
- Grose River Valley Walk (in Australia)
- (gross energy) higher heating value
- ground (disambiguation)
- ground control station (GCS) (for "unmanned vehicles in the air or in space")
- (ground hugging: see) terrain-following radar
- ground level power supply (surface current collection) (for street trams)
- ground propulsion
- Ground Proximity Warning System (GPWS) (for aircraft)
- Ground Wave Emergency Network (GWEN) (in the US)
- (ground-level ozone) tropospheric ozone
- ground-penetrating radar
- groundcover
- groundskeeping
- groundwater
- groundwater flow equation
- groundwave
- Group (Botany)
- (group [geology]: see) stratum
- Group for the Scientific Reappraisal of the HIV-AIDS Hypothesis
- grove (nature)
- grow-op (marijuana grow operation]] (often damaging the environment)
- growing bananas
- growing degree day (GDD)
- growing season
- growth management (in urban studies and planning)
- gryphon (geology)
- Guadalupe Fur Seal
- Guadalupe River (California) (see "mercury mines" and "salmon spawning")
- guano ("droppings of seabirds and bats")
- (Guardian Ethic: see) Jane Jacobs (writer and activist) (see under Systems of Survival and under The Nature of Economies)
- guerilla gardening
- (Guiana Space Centre) Centre Spatial Guyanais (in French Guiana)
- (Guided Light Transit) Bombardier Guided Light Transit (Transport sur Voie Réservée) (in France)
- (guided train: see) train
- (Guinea Worm Disease) (GWD) Dracunculiasis (from infested water)
- (Gujarat earthquake of 2001) 2001 Gujarat Earthquake
- Gulf Coast of the United States
- Gulf Islands National Park Reserve (in British Columbia in Canada)
- Gulf Islands National Seashore (in the Gulf of Mexico in the US)
- Gulf of Mexico (see under Pollution)
- Gulf States Marine Fisheries Commission (GSMFC) (in the US)
- Gulf Stream (North Atlantic Drift)
- Gulf War oil spill
- Gulf War syndrome
- (gun range) shooting range
- gun safety (see under Protective gear and health issues)
- Gun-Free School Zones Act of 1990 (in the US)
- Gunbarrel Highway (in Australia) (see "atomic bomb testing")
- (guncotton) nitrocellulose
- gunpowder
- gutter (disambiguation)
- gypsum (see "fire resistance" under Chemical structure and see "agricultural soil amendment" under Uses)
H
- (H-bomb: see) nuclear weapon
- H1N1 (an influenza type)
- H5N1 (a strain of influenza)
- (habitable planet: see) planetary habitability
- habitable zone (HZ) (in astronomy)
- habitat
- habitat conservation (habitat protection)
- habitat destruction (habitat loss)
- habitat fragmentation
- Habitat II (UN conference) (in 1996)
- Habitation Module (for the International Space Station)
- habitrail (for pets)
- (hadopelagic zone: see list at) pelagic zone (in oceanography)
- Haemophilus influenzae (Pfeiffer's bacillus)
- Haemophilus influenzae biogroup aegyptius (Hae)
- (haemotoxin) hemotoxin ("frequently seen in venomous animals")
- hafnium (see under Precautions)
- hail
- hairpin turn
- Hale Observatories
- Hale telescope (in California in the US)
- (Hale-Bopp) Comet Hale-Bopp (C/1995 O1)
- Haleakala Observatory (in Hawaii in the US)
- "half of humanity is alive now"
- half-life
- halide (compound used for lighting)
- Halifax Explosion (in Nova Scotia in Canada)
- halitosis (bad breath)
- halo (see under Optical phenomenon)
- haloalkane (see under Environmental issues)
- halobacterium
- halogen ("can be harmful or lethal to biological organisms")
- (halogen lamp: see) incandescent light bulb
- Hamilton Pool Preserve (in Texas in the US)
- hamlet (fish)
- hammerhead shark (three species can be dangerous to humans)
- Hammond Circus Train Wreck (in Indiana in the US)
- Hampstead Heath (in London in the UK)
- hamster (see "throwing litter" and "germs" under Housing and see "pollutions" and "mold" under Food)
- hand, foot and mouth disease (HFMD)
- (hand soap: see) soap (see under Uses and under Disadvantages)
- hand warmer
- hand washing
- Handbook of the Birds of the World (multi-volume series of books)
- handkerchief
- handshake (see "viruses")
- hang-glider (see under Flying)
- Hannover Zoo (in Germany)
- (Hansen's disease) leprosy (infectious disease)
- hantavirus
- harbor
- harbor porpoise (see under Conservation)
- (harbor seal) common seal (see preamble before table of contents)
- (hard coal: see) anthracite coal
- (hard good) durable good
- hard radiation
- hard rock mining
- (hard rubber: see) ebonite
- hard shoulder
- hard water (see under Health considerations)
- Harmelen train disaster (in the Netherlands)
- (harmful effects of firecrackers) harmful effects of firecrackerts
- harpoon
- (Harstad offshore patrol vessel) KV Harstad (of Norway)
- Harvard College Observatory (in the US)
- Harvard oncomouse (Harvard mouse) (a genetically modified laboratory mouse)
- Harvard-Smithsonian Center for Astrophysics (in the US)
- harvest
- harvest excursion
- harvest mite (chigger) (red bug) (Trombiculid mite) (Scrub-itch mite)
- harvest mouse
- (harvest spider) (harvestman) Opiliones (see under Endangered status)
- hatchery
- haven (disambiguation page)
- Hawaii tropical moist forests
- Hawaii Volcanoes National Park
- Hawaiian aquaculture
- Hawaiian Islands National Wildlife Refuge
- Hawaiian Volcano Observatory
- Haxted Watermill (in the UK)
- hay
- hay fever
- Hayward Fault Zone (in California in the US)
- hazard (disambiguation page)
- Hazard Analysis and Critical Control Points (HACCP)
- hazard identifier (UN number) (UN ID)
- hazard risk management
- hazard warning symbol
- hazardous material
- (hazardous materials labels: see) dangerous goods
- hazardous powders testing kit
- Hazardous Substances and New Organisms Act (HSNO) (in New Zealand)
- hazardous waste
- haze
- hazmat suit
- (health disaster: see) epidemic
- health effect
- health issues and the effects of cannabis (see under Smoking)
- health measures during the construction of the Panama Canal
- health physics
- (health resort: see) spa town
- health tourism
- healthy city
- Healthy Forests Initiative (in the US)
- heat
- (heat budget: see) radiation budget
- (heat equator: see) thermal equator
- (heat lightning: see) lightning
- heat pipe
- (heat radiator: see) thermal radiation
- heat wave
- Heat Wave of 1980 (in the US)
- Heat Wave of 1995 Derecho Series (in the US)
- (heat-island phenomenon: see) urban heat island (UHI)
- (heater: see) HVAC (heating, ventilation, and air-conditioning)
- (heath forest: see) Kerangas forest
- heating degree day (HDD)
- heating value
- (Heaviside layer) Kennelly-Heaviside layer (E region) (in the atmosphere)
- heavy crude oil
- (heavy fuel oil: see) residual fuel
- (heavy hydrogen) deuterium
- heavy industry
- heavy ion
- heavy metals
- heavy ion
- (Heavy Oil and Tar Sand: see) tar sands (oil sand) (bituminous sand)
- Heavy Snow Warning
- heavy water (deuterium oxide) (see under Toxicity)
- hedge (gardening) (see under British hedges)
- hedge laying (see under hedge laying)
- hedgerow removal
- helicopter (see under Hazards of helicopter flight)
- helicopter noise reduction
- heliograph
- heliopause
- Helios Prototype (uninhabited aerial vehicle)
- helioseismology
- heliosphere
- heliostat
- heliox
- helium (see under Vocal effect and health precautions)
- hemotoxin ("frequently seen in venomous animals")
- Henan Agricultural University (in the People's Republic of China)
- Henipavirus
- Henry Thomas, suspected victim of spontaneous human combustion
- hepatitis
- herbicidal warfare
- herbicide
- herbivore
- Hercynian Forest (in Europe)
- herd immunity
- heritage railway
- heritage site
- heritage tourism
- (heritage train: see) restored trains
- heritage trees in Singapore
- hermetically sealed
- herpetology (study of reptiles and amphibians) (see "global ecology" in article)
- (Hertz effect) photoelectric effect
- hessian fly (pest of cereal crops)
- Hetch Hetchy to Lake Vernon Trail
- Hetch Hetchy Valley (in California)
- (heterosphere: see) Earth's atmosphere (see under Heterosphere)
- heterothermic (describing creatures which vary between homeothermy and poikilothermy)
- heterotroph (in biology)
- hexamine
- hexamine fuel tablet
- Hiawatha National Forest (in Michigan in the US)
- hibernation (in biology)
- hibernation induction trigger (hibernation inducement trigger) (HIT)
- Hibernia (oil field)
- hierarchy of roads
- (hierarchy of streets) street hierarchy
- High Energy Liquid Laser Area Defense System (HELLADS)
- High Frequency Active Auroral Research Program (HAARP)
- High Frequency Ventilation
- High Mobility Multipurpose Wheeled Vehicle (HMMWV) (Hum-Vee)
- high powered rocket
- high pressure area
- (high pressure sodium lamp: see) sodium vapor lamp
- High Production Volume Chemicals
- High Resolution Fly's Eye Cosmic Ray Detector
- high voltage
- (high water: see) tide
- high-altitude airship (HAA)
- (high-density amorphous ice: see) amorphous ice
- high-energy astronomy
- high-energy nuclear physics
- (high-explosive: see) explosive material
- (high-rise building) skyscraper
- high-speed minesweeper
- high-speed rail
- high-speed transport
- (high-tension line: see) electric power transmission (see under Health concerns)
- high-voltage direct current ( see under Possible health advantages of HVDC over AC transmission)
- high-voltage hazards
- highland (geography)
- (highly enriched uranium: see) enriched uranium
- highway
- hiking (see under Ecological impact of hiking)
- (hiking trail: see) trail
- hill
- hillclimbing (railway)
- hillwalking
- Himalayas (mountain range)
- Hindenburg disaster (in New Jersey in the US)
- Hindenburg Disaster Newsreel Footage (documentary film
- (hindmilk: see) breast milk (affecting the dairy industry, which affects the environment)
- Hinds Lake Hydroelectric Generating Station (in Newfoundland and Labrador in Canada)
- Hindu Kush (mountain range)
- hinterland
- Hinterland Who's Who (public service ads)
- (hippie crack) nitrous oxide (laughing gas)
- hippie trail
- (hippocampus [fish]: see) seahorse (endangered)
- hippopotamus ("one of the most dangerous animals in Africa")
- (Hiroshima and Nagasaki bombings: see) atomic bombings of Hiroshima and Nagasaki
- Hiroshima Botanical Garden (in Japan)
- hirudiculture (culture of leeches)
- hirudotherapy (treatment with leeches) (letting blood into the environment)
- histamine
- (hister beetle) clown beetle (living on dung, carrion, etc.)
- Histoire Naturelle des Poissons (a 22-volume study of ichthyology)
- Historia Plantarum (atlas of botany)
- historic pictures of 1906 San Francisco earthquake
- historical ecology
- historical geography
- historical geology
- historical roads and trails of the United States
- (history of aerial warfare: see) aviation history
- history of agricultural science
- (history of agriculture: see) agriculture
- History of Animals (zoological text)
- history of bus transport in Hong Kong
- history of chemistry
- (history of cities: see) city (see under Environmental effects)
- history of coal mining
- history of ecology
- (history of flight) aviation history
- history of gardening
- history of geodesy
- history of geography
- history of hurricanes in the Caribbean
- history of materials science
- history of measurement
- history of nuclear weapons
- history of physics
- history of radar
- history of radio
- history of rail transport
- history of salt in the United States
- history of standard time in the United States
- history of street lighting in the United States
- history of telescopes
- (history of the airplane: see) aviation history
- history of the automobile
- history of the bicycle
- history of the British canal system
- history of the London Underground
- history of the Mass Rapid Transit (in Singapore)
- history of the petroleum industry in North America
- history of thermodynamics
- (history of transportation: see) timeline of transportation technology
- history of warfare
- history of whaling
- history of zoology (before Darwin)
- history of zoology, post-Darwin
- hit and run (vehicular)
- hoarfrost
- (Hodges meteorite: see) Ann Hodges
- (hog cholera) classical swine fever (CSF)
- hog dogging (hog-dog fighting)
- hog lot (hog farm)
- (hog pen: see) family farm hog pen
- (hog-hunting) pigsticking
- Hoh Rain Forest (in Washington state in the US)
- Hoh River (in Washington state in the US)
- Hólar University College (in Iceland)
- holarctic (ecozone)
- Holburn Lake and Moss (nature reserve) (in the UK)
- Holcomb Perigee (aircraft)
- (holiday house: see) cottage
- holiday resort (see under Pros and cons of all-inclusive resorts)
- Holland Tunnel fire (in the US)
- (hollow [geography]: see) valley
- (hollow charge: see) shaped charge
- hollow way
- Holly Springs National Forest (in the US)
- home appliance
- home gardens (forest gardens)
- (home zone) living street (Dutch: woonerf)
- homebuilt aircraft
- home-built automobile engines
- homeless shelter
- homelessness
- homelessness in Canada
- homelessness in the United States
- (homeothermic: see) warm-blooded
- homeothermous organisms
- homestead (disambiguation page)
- homestead principle
- homesteading
- Honam Expressway (Honamseon) (in South Korea)
- Honam Line (in South Korea)
- honey bucket (for human waste)
- honeybee (important pollinator)
- Hong Kong Flu
- Hong Kong Highways
- Hong Kong Tramways
- Hong Kong Zoological and Botanical Gardens
- Hong Kong-Macau Ferry Pier
- Honshu-Shikoku Bridge Project (in Japan)
- hoodoo (geology)
- (hoof-and-mouth disease) foot-and-mouth disease (FMD)
- Hooghly River (in India)
- horizon
- horizon soil
- horology
- horse and buggy
- horse meat
- horse mill
- horse-drawn boat
- horsecar
- Horseshoe Falls (Canada)
- horticulture
- (hospital laboratory: see) medical laboratory
- host (biology)
- hot air balloon
- (hot air engine) Stirling engine
- hot box
- hot spring (hydrothermal spring)
- (hot water heater: see) water heater
- hot zone
- hotspot (geology)
- house
- house centipede
- (house dust: see) dust (dirt)
- house dust mite
- house fly (see under Flies and humans)
- House Mouse (see under Mice and men and under Mutant and transgenic strains)
- house spider (disambiguation page)
- (household power: see) mains electricity
- household seismic safety (article in need of attention)
- houseplant
- houseplant care
- (hover mower: type of) lawn mower
- hovercraft (air-cushion vehicle)
- Huang He River (in the People's Republic of China)
- Huascarán National Park (in Peru)
- Hubbard Brook Experimental Forest (in New Hampshire in the US)
- (Hubbert implications: see) oil depletion
- Hubbert peak theory (peak oil)
- Hubble (disambiguation page)
- (Hubble, Edwin Powell) Edwin Hubble (American astronomer)
- Hubble Deep Field (HDF) (region of sky)
- Hubble Deep Field South
- Hubble Space Telescope (HST)
- (Hubble Space Telescope, Guide Catalog) (HSTGC) Guide Star Catalog (GSC)
- Hubble Ultra Deep Field (HUDF) (region of space)
- Hubble's law (in physical cosmology)
- (Hubbs' beaked whale: see) mesoplodont whale
- Huddersfield Narrow Canal (in the UK)
- Huddersfield Narrow Canal Pylon (in the UK)
- human body disposal
- (human body louse: see) sucking louse
- (human bomb: see suicide bombing
- human cloning
- human echolocation
- human ecology
- human energy
- human factors (ergonomics)
- Human Factors for Highway Engineers (book)
- human feces
- human genetic engineering
- Human Genome Diversity Project (HGDP)
- Human Genome Organisation (HUGO)
- Human Genome Project (HGP)
- human geography (anthropogeography)
- (human immunodeficiency virus) HIV
- human leopards (cannibals)
- human manure
- human migration
- (human monkeypox: see) monkeypox (virus)
- human papillomavirus (HPV)
- human parainfluenza viruses (HPIVs)
- human parasitic diseases
- human parvovirus B19
- (human population: see) world population
- human powered vehicle (HPV)
- human radiation experiments
- human shield
- human spaceflight
- (human spontaneous combustion) spontaneous human combustion
- (human waste: see) sewage treatment
- human-animal communication
- Human-powered transport
- humanitarian aid
- humanitarian crisis
- humanitarian response to the 2004 Indian Ocean earthquake
- humanure
- Humboldt Current (Peru Current)
- Humboldt Penguin ("vulnerable")
- humectant
- (Humid Chaco: see) Gran Chaco (in South America)
- humid continental climate
- (Humid Pampas: see) pampa (in South America)
- humid subtropical climate
- (humidex) heat index (HI)
- humidifier
- humidity
- humidor
- (humongous fungus: see) Armillaria ostoyae
- Humpback Whale
- humphead wrasse ("endangered")
- (hundred-mile wilderness: see) 100-Mile Wilderness (in Maine in the US)
- (Hunger Winter) Dutch famine of 1944
- Hungerford Bridge (in London in the UK) (see under The new footbridges)
- hunt saboteur
- hunter-gatherer
- hunter-warrior
- hunting
- Hunting Act 2004 (in the UK)
- (hunting mushrooms) mushroom hunting (mushrooming)
- (hunting with hounds) fox hunting
- Huntsville, Alabama Tornado (in 1989)
- Hurlstone Agricultural High School (HAHS) (in New South Wales in Australia)
- Huron-Manistee National Forests (in Michigan in the US)
- (hurricane: see) tropical cyclone
- Hurricane Andrew (in 1992)
- Hurricane Charley (in 2004)
- Hurricane Dennis (in 2005)
- Hurricane Emily (in 2005)
- Hurricane Frances (in 2004)
- Hurricane Ivan (in 2005)
- Hurricane Jeanne (in 2004)
- Hurricane Katrina (in 2005)
- Hurricane Katrina/Chart
- Hurricane Katrina (lists)
- Hurricane Katrina Aid
- Hurricane Katrina and technology
- (Hurricane Katrina conspiracy theories) alternative theories regarding Hurricane Katrina
- Hurricane Katrina disaster relief
- Hurricane Katrina effects by region
- Hurricane Katrina in historical context
- Hurricane Katrina timeline
- (Hurricane Katrina's effects on law and order: see) civil disturbances and military action in New Orleans after Hurricane Katrina
- (hurricane names: see) lists of tropical cyclone names
- Hurricane Ophelia (in 2005)
- hurricane preparedness for New Orleans
- Hurricane Rita (in 2005)
- hurricane season (disambiguation page)
- hurricane shutters
- Hurricane Stan (in 2005)
- (hurricane tie: see) tie (engineering)
- (hurricane warning: see) tropical cyclone warnings and watches
- (hurricane watch: see) tropical cyclone warnings and watches
- Hurricane Wilma (in 2005)
- hut
- hutch (animal cage)
- (Hwang Ho) Huang He River (in the People's Republic of China)
- hybrid
- hybrid airship
- hybrid bicycle
- hybrid pylon
- hybrid rocket
- hybrid seed
- hybrid vehicle
- (hybrid what vehicle: see) plug-in hybrid electric vehicle (PHEV)
- hybridisation (disambiguation page)
- hybridisation (molecular biology)
- hybridisation in gulls
- hybridism (in biology)
- (hybridoma: see) monoclonal antibody (mAb)
- (hydrargyrum) mercury (element)
- (hydrated lime) calcium hydroxide (see under Uses)
- hydraulic engineering
- hydraulic fluid
- hydraulic machinery
- hydraulic mining
- hydraulic ram
- hydraulics
- hydrazine (see under Use)
- hydro (disambiguation page)
- Hydro Tasmania (The Hydro-Electric Commission) (HEC) (in Australia)
- (hydro turbine) water turbine
- Hydro-Electric Power Commission of Ontario
- Hydro-Québec
- hydrobiology
- hydrocarbon
- hydrocarbons on other planets
- (hydrochlorofluorocarbon [HCFC]: see) haloalkane
- hydrocopter
- (hydrocracking: see) cracking (chemistry)
- (hydrocyclone) sand separator
- hydrodynamics
- hydroelectric dam of Sélingué (in Mali in Africa)
- hydroelectric dams on the Columbia River (in North America)
- (hydroelectric energy storage: see) pumped-storage hydroelectricity
- hydroelectricity (hydroelectric power)
- (hydrofluorocarbon [HFC]: see) haloalkane
- hydrofoil
- (hydrogen bomb: see) nuclear weapon
- hydrogen cycle
- hydrogen economy
- (hydrogen fuel cell: see) fuel cell
- (hydrogen fusion: see) nuclear fusion
- hydrogen highway
- (Hydrogen Outreach Program for Education [for the Department of Energy]) HOPE Curriculum (in the US)
- hydrogen vehicle
- hydrogeology
- hydrograph
- hydrographic office
- hydrographic survey
- hydrography
- Hydrography of the Oak Ridges Moraine (in Ontario in Canada)
- (hydrologic cycle) water cycle
- hydrological phenomenon
- hydrology
- (hydromagnetics) magnetohydrodynamics (MHD)
- hydromechanics
- hydrometallurgy
- Hydrometeorological Prediction Center (HPC) (in the US)
- hydrophobia (disambiguation page) (one sense related to rabies)
- hydrophyte
- hydroponics
- hydropower
- hydroseeding (hydromulching)
- hydrosphere
- (hydrostatics) fluid statics
- hydrothermal circulation
- (hydrothermal metamorphism: see) metamorphism (see under Hydrothermal metamorphism)
- (hydrothermal spring) hot spring
- hydrothermal vent
- hydrotropism
- hydrozoning (in landscaping)
- hygiene
- hygiene hypothesis
- hygiene program
- hygrometer (different from hydrometer)
- hygroscopic (hydroscopic)
- (hylotox 59: see) DDT
- Hymenoptera (order of insects)
- hypercane ("hypothetical class of hurricane")
- hypermiler
- hypoallergenic dog breeds
- hypocaust (system of central heating)
- hypocenter (hypocentre)
- (hypoxic zone) dead zone
- hypsography
- hypsometer
- hypsometry
I
- iatrochemistry
- iatrogenic
- ice
- Ice Accretion Indicator
- ice age
- Ice Age Trail (in Wisconsin in the US)
- ice algae
- ice blasting
- ice boat
- ice cap
- ice climbing
- ice core
- ice dam
- (ice erosion: see) erosion (see under Ice erosion)
- ice field (icefield)
- ice fishing
- (ice floe: see) sea ice
- (ice fog: see) fog (see "ice fog" in article)
- Ice Front
- Ice Harbor Lock and Dam (in Washington in the US)
- ice hotel
- ice nucleus
- ice palace (ice castle)
- ice resurfacer
- ice rink
- ice scour
- ice sheet
- ice shelf
- ice spike
- (ice stone) cryolite
- ice storm
- (Ice Storm 1998) 1998 Canada ice storm
- Ice Storm Warning
- ice swimming
- (ice volcano: see) cryovolcanism
- ice wedge
- ice worm
- Ice XII
- Ice-9 (see under Main usage)
- Ice-9 type transition
- iceberg
- Iceberg B-15
- (Iceberg B-22: see) Thwaites Ice Tongue (onto Antarctica)
- icebreaker
- (icecrete: see) pykrete
- IceCube Neutrino Detector
- Icefields Parkway (in Alberta in Canada)
- icehouse (building)
- Iceland hotspot
- Icelandic hydroelectric power stations
- Ichneumon wasp (sometimes incorrectly called "Ichneumon fly") (some used in "biological pest control")
- ichnology
- ichthyology (study of fish)
- ice
- icefish (white-blooded fish)
- icing (nautical)
- icy moon
- Idaho National Laboratory (INL) (in the US)
- idealised population
- igneous rock
- (ignis fatuus: see) will o' the wisp (see under Theories of origin)
- ignition
- ignition coil (spark coil)
- ignition system
- Iguaçu (in triple frontier of Paraguay, Brazil, and Argentina)
- Iguassu Falls (on border between Brazil and Argentina)
- Iguazú National Park (in Argentina)
- IJssel (Gelderse IJssel) (in the Netherlands)
- IJsselmeer (Lake IJssel) (in the Netherlands)
- (IJsselmeer Polders: see) Zuiderzee Works (in the Netherlands)
- Ili River (in Kazakhstan and in China)
- Ilin island cloudrunner (extinct rodent from the Philippines)
- illegal drug (see "environmental hazards")
- (illegal fishing: see) poaching
- (illegal hunting: see) poaching
- illegal logging
- (Illinoian glaciation: see) Wolstonian glaciation
- Illinois and Michigan Canal (see "storm in 1885")
- illuminance
- illuminating gas
- illumination (disambiguation page)
- (image: see) Wikipedia:List of images (especially Wikipedia:List of images/Nature)
- (imitation meat: see) meat analogue
- Immediately Dangerous to Life and Health (IDLH or NIOSH IDLH) (in the US)
- immigrant deaths along the U.S.-Mexico border
- immune system
- immunization (medicine)
- immunodeficiency (or immune deficiency)
- (immunogen: see) antigen
- immunology
- immunotherapy
- immunotoxin
- impact crater (impact basin)
- (impact of global change on agriculture: see) global warming and agriculture
- (impact of the 2004 Indian Ocean earthquake on Indonesia: see) effect of the 2004 Indian Ocean earthquake on Indonesia
- impact winter
- impactite
- (Impenetrable Forest: see) Bwindi Impenetrable Forest (in Uganda)
- Imperial unit of measurement
- implications of peak oil
- implosion ("a reverse explosion")
- impluvium
- Important Bird Area (IBA)
- in silico
- in situ
- (in situ tree: see) polystrate fossil (upright fossil)
- in vitro meat
- in vitro toxicology
- (in-flight refueling [IFR]) aerial refueling (air-to-air refueling [AAR])
- in-situ conservation
- Inaccessible Island (extinct volcano)
- (inactive layer: see) active layer (in permafrost)
- Inca road system
- Inca rope bridge
- incandescence
- incandescent light bulb
- incendiary
- incendiary bomb
- incendiary device
- (inches of mercury: see) pressure
- incidence (epidemiology)
- incidental radiator
- (incidents in aviation: see) accidents and incidents in aviation
- incineration (including that of medical waste)
- (inclined railway) funicular (funicular railway) (inclined plane) (cliff railway)
- (inclosure) enclosure
- Inclosure Act (in the UK)
- (Incorporated Research Institutions for Seismology) IRIS
- increase biodiversity
- Independent Power Producer
- indeterminate growth (in biology)
- India Meteorological Department
- Indian Agricultural Research Institute (IARI)
- Indian coal
- Indian Famine Codes
- Indian Forest Service (IFS)
- (Indian Ocean earthquake: see) 2004 Indian Ocean earthquake
- Indian Point Energy Center (IPEC) (nuclear power plant in New York)
- (Indian rubber tree) Ficus elastica (rubber fig) (rubber tree) (rubber plant)
- Indian summer
- Indianapolis 500 (Indianapolis 500 Mile Race) (Indy 500)
- indicator plant
- indicator species
- (indigenous depopulation in the Americas: see) population history of American indigenous peoples (see under Depopulation from disease)
- indirect potable use
- individual action against global warming
- Indomalaya Ecozone
- indoor air quality (IAQ)
- (indoor climate control) HVAC ("heating, ventilation and air-conditioning")
- Indoor Environmental Institute (IEI)
- (indoor garden: see) garden
- (indoor plumbing: see domestic water system
- induced seismicity
- induction heating
- (induction lighting: see) electrodeless lamp
- induction welding
- (industrial agriculture: see) agriculture
- industrial and multiphase power plugs and sockets
- industrial biotechnology (white biotechnology)
- Industrial Canal (near New Orleans, Louisiana)
- industrial disasters
- industrial ecology
- (industrial health and safety issues in asbestos-related diseases: see) asbestos and the law
- industrial hemp
- industrial hygiene
- industrial noise
- industrial park
- industrial railway
- Industrial Revolution
- (industrial ultrasonography: see) ultrasound
- industrial waste
- industrial wastewater treatment
- (industrial whistle: see) whistle (see "sunroof")
- industrialisation
- (industrialized nation: see) developed country
- industry
- (industry/Primary sector: see) primary sector of industry
- (industry/Secondary sector: see) secondary sector of industry
- (industry/Tertiary sector: see) tertiary sector of industry
- inert gas
- (inert gas narcosis: see) nitrogen narcosis
- inertial confinement fusion (ICF)
- (infant botulism: see) botulism
- infection
- infectious disease (communicable disease)
- infectious disease in the 20th century
- infectious disease reporting
- infestation
- influenza (the flu) (the grippe)
- (influenza epidemic of 1918: see) Spanish flu (Great Influenza Pandemic) (the 1918 Flu Epidemic) (La Grippe)
- influx of disease in the Caribbean
- Infra-Red Telescope Facility (IRTF)
- infrared (IR) radiation
- infrared astronomy
- Infrared Space Observatory (ISO)
- infrasound
- infrastructure
- Inga-Shaba (electrical transmission line project) (in the Democratic Republic of Congo)
- inland harbor
- (inland hurricane wind warning: see) tropical cyclone warnings and watches
- (inland tropical storm wind warning: see) tropical cyclone warnings and watches
- (inland tropical storm wind watch: see) tropical cyclone warnings and watches
- Inland Waterways Association (IWA) (in the UK)
- Inland Waterways Protection Society (IWPS) (in the UK)
- inner city
- Innoko National Wildlife Refuge (in Alaska in the US)
- inoculation
- inorganic chemistry
- inorganic compound
- insect (see under Roles in the environment and in human society)
- Insect Habitat (science payload in space)
- (insect locust: see) locust ("can strip fields rapidly")
- (insect pollination) entomophily
- insect repellent
- (insect venom: see) venom (poison)
- insecticide (see under Environmental Effects)
- insectivore
- (insectivorous plant: see) carnivorous plant
- insolation
- Institut national agronomique Paris-Grignon (INA P-G) (in France)
- Institut National de la Recherche Agronomique (INRA) (in France)
- Institut National de Physique Nucléaire et de Physique des Particules (in France)
- (Institut Pasteur) Pasteur Institute (in France)
- Institute for Environmental Assessment (in Denmark)
- (Institute for Genomic Research: see) The Institute for Genomic Research (TIGR) (in the US)
- (Institute for Nuclear Studies: see) Enrico Fermi Institute (in the US)
- Institute for Solar Physics (in Italy)
- Institute of Biochemistry and Biophysics (IBB) (in Iran)
- Institute of Biosciences and Technology (IBT) (in Texas in the US)
- Institute of Cetacean Research (ICR) (in Japan)
- Institute of Geological and Nuclear Sciences Limited (GNS) (in New Zealand)
- Institute of Molecular and Cell Biology (IMCB) (in Singapore)
- Institute of Terrestrial Ecology atlases (in the UK)
- Institute of Zoology (IoZ) (in the UK)
- instrument meteorological conditions (IMC)
- instrumental temperature record
- insulation (thermal)
- (insulation of sound: see) sound proofing
- insulators (electrical)
- insurance (see under Types of insurance)
- integral ecology
- (integrated cycling: see) vehicular cycling (VC)
- integrated farming (integrated agriculture)
- Integrated Ocean Drilling Program (IODP) (international)
- Integrated Pest Management (IPM)
- Integrated Taxonomic Information System (ITIS) (at first in the US, now international)
- intelligent transportation system (ITS) (in the US)
- intensive farming
- intentional radiator
- Inter-American Institute for Global Change Research
- inter-city rail
- (interchange [highway]: see) road junction
- (intercity bus: see) bus
- InterCity Express (ICE) (in Germany and neighboring countries)
- intercropping
- (Interdecadal Pacific Oscillation: see) Pacific decadal oscillation (PDO) (in climatology)
- (interglacial: see) glaciation
- Intergovernmental Oceanographic Commission
- Intergovernmental Panel on Climate Change (IPCC)
- (Interim Biogeographic Regionalisation for Australia [IBRA]: see) ecoregions of Australia
- intermediate technology
- intermodal freight transport
- intermodal passenger transport
- internal combustion engine (see under Fuel type)
- (internal drainage system: see) endorheic
- (International Agreement for the Regulation of Whaling: succeeded by) International Convention for the Regulation of Whaling
- international agricultural research
- International Atomic Energy Agency (IAEA)
- (International Biosphere Reserve: see) Biosphere reserve
- (International Buy Nothing Day: see) Buy Nothing Day (to focus on poverty and wasteful consumption)
- International Center for Tropical Agriculture (CIAT) (Centro Internacional de Agricultura Tropical)
- International Centre for Genetic Engineering and Biotechnology
- (International Classification of Diseases [ICD]: see) International Statistical Classification of Diseases and Related Health Problems
- International Code of Marketing of Breast-milk Substitutes (affecting the dairy industry, and therefore the environment)
- International Commission for the Conservation of Atlantic Tunas (ICCAT)
- (International Commission for the North Atlantic Fisheries [ICNAF]: replaced by) Northwest Atlantic Fisheries Organization (NAFO)
- International Commission on Stratigraphy
- International Committee on Anthropogenic Soils (ICOMANTH)
- International Conference on Cold Fusion (ICCF)
- (International Conference on Population and Development: see) Cairo International Conference on Population and Development (in 1994)
- (International Conservation Union: see) World Conservation Union (International Union for Conservation of Nature and Natural Resources [IUCN])
- International Continental Scientific Drilling Program
- (International Convention for the Prevention of Pollution From Ships: see) MARPOL 73/78
- International Convention for the Regulation of Whaling (signed in 1946)
- International Council for the Exploration of the Sea (ICES) (established in 1902)
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT)
- International Dark-Sky Association (IDA)
- international environmental law
- International Fair Trade Association (IFAT)
- International Federation of Chemical, Energy, Mine and General Workers' Unions (ICEM)
- International Federation of Organic Agriculture Movements (IFOAM)
- (international food aid: see) World Food Programme (WFP)
- International Forum on Globalization (IFG)
- International Fund for Agricultural Development
- International Geophysical Year (IGY) (1957-1958)
- International Glaciological Society (IGS)
- International Heliophysical year (IHY) (2007-2008)
- International Human Powered Vehicle Association
- International Hydrographic Organization (IHO)
- International Institute of Tropical Agriculture (IITA)
- International Journal of Biological Sciences
- International Latitude Observatory
- International League for the Protection of Horses (ILPH)
- International Maize and Wheat Improvement Center (CIMMYT) (Centro Internacional de Mejoramiento de Maíz y Trigo)
- International Maritime Organization (IMO)
- International Meteor Organization (IMO)
- International Meteorological Organization (IMO)
- (International Metric Convention: see) Convention du Mètre (in 1885)
- International Near-Earth Asteroid Survey (INAS)
- International Nuclear Events Scale (IAEA INES Scale)
- International Nuclear Information System (INIS)
- International Opium Convention (signed in 1912)
- (International Panel on Climate Change: see) Intergovernmental Panel on Climate Change (IPCC)
- International Physicians for the Prevention of Nuclear War (IPPNW)
- International Planetarium Society (IPS)
- International Plant Protection Convention (IPPC)
- International Polar Year (IPY) (1882-1883; 1932-1933)
- International POPs Elimination Network (IPEN) (POPs = persistent organic pollutants)
- International Potato Center (CIP) (Centro Internacional de la Papa)
- International Programme for Antarctic Buoys (IPAB)
- International Refugee Organization (IRO)
- International Regulations for Preventing Collisions at Sea 1972
- International Resources Group
- international response to Hurricane Katrina
- International Rice Research Institute (IRRI)
- International Risk Governance Council (IRGC)
- International Seabed Authority
- International Society for Cryobiology
- International Society for Ecology and Culture (ISEC)
- International Society of Arboriculture
- International Space Station (ISS)
- (international standard atmosphere: see) standard conditions for temperature and pressure
- International Statistical Classification of Diseases and Related Health Problems (ICD)
- (international sunspot number) Wolfer number (relative sunspot number) (Wolf number) (Zürich number)
- (International System of Units) (SI) (Système International d'Unités)
- International Temperature Scale of 1990 (ITS-90)
- International Terrestrial Reference System (ITRS)
- (International Thermonuclear Experimental Reactor) ITER
- International Traffic in Arms Regulations (ITAR)
- International Treaty on Plant Genetic Resources for Food and Agriculture (International Seed Treaty)
- International Tribunal for the Law of the Sea
- International Tropical Timber Agreement, 1983 (Tropical Timber 83)
- International Tropical Timber Agreement, 1994 (Tropical Timber 94)
- International Ultraviolet Explorer (IUE) (astronomical observatory satellite)
- (International Union for Conservation of Nature and Natural Resources [IUCN]) World Conservation Union
- International Union for the Protection of New Varieties of Plants (UPOV) (Union internationale pour la protection des obtentions végétales)
- International Union of Geological Sciences (IUGS)
- International Union of Pure and Applied Chemistry (IUPAC)
- (International Union of Pure and Applied Physics) IUPAP
- International Vegetarian Union (IVU)
- International Water Management Institute (in Sri Lanka)
- international waters (transboundary waters)
- International Whaling Commission (IWC)
- (International Whaling Convention) International Convention for the Regulation of Whaling
- International Wheat Council (IWC)
- international wheat production statistics (may yet be merged)
- interplate earthquake
- (interspecific breeding: see) hybrid
- (intertidal or littoral zone) foreshore
- intertropical convergence zone (ITCZ) (Intertropical Front) (Equatorial Convergence Zone)
- interurban
- interurban streetcars in Southern New England
- Interurban Transit Partnership (in Grand Rapids, Michigan, in the US)
- Into Thin Air: A Personal Account of the Mt. Everest Disaster (book)
- intra-species recognition ("necessary for procreation")
- Intracoastal Waterway (in the US) (consisting of the Gulf Intracoastal Waterway and the Atlantic Intracoastal Waterway)
- intragenomic conflict
- intraplate earthquakes
- intraspecific breeding
- Intrazonal Soil
- Introduction to Geomagnetically Trapped Radiation (written work)
- intrusion (geology)
- (intrusive sheet: see) sill (geology)
- (inundation) flood
- inundation of the Wieringermeer (in the Netherlands)
- invasive plants
- invasive species
- invasive species in Australia
- invasive species in New Zealand
- invertebrate
- inverted river delta
- (inward-flow turbine: see) Francis turbine
- iodine (see under Occurrence)
- iodised salt (iodized salt)
- ion
- (ion storm: see) solar wind
- ion therapy
- ion wind (ion wind)
- ionization chamber
- (ionized gas) plasma (physics)
- ionizing radiation
- ionosonde
- ionosphere
- ionospheric reflection
- ionospheric sounding
- Iowa Great Lakes (natural glacial lakes) (in the US)
- Iraq Petroleum Company
- Irish Famine (1879)
- (Irish Famine of 1740-41) Great Irish Famine (1740-1741)
- Irish farm subdivision
- Irish National Botanic Gardens
- Irish Naturalists' Journal
- Irish Peatland Conservation Council (IPCC)
- Irish Potato Famine (1845-1849)
- iron (see under Occurrence)
- iron catastrophe
- iron cycle
- iron deficiency (medicine) (relevant to crop agriculture and to animal health)
- iron deficiency (plant disorder)
- iron fertilizing
- (iron mining: see) mining
- iron ore
- Iron Ore Company of Canada
- (iron ore trade during World War II: see) Swedish iron ore during World War II
- iron oxide
- iron poisoning
- irradiance
- irradiated mail
- irradiation
- (Irrawaddy River) Ayeyarwady River (in Myanmar, formerly Burma)
- irrigation
- irrigation in Saudi Arabia
- irrigation scheduling
- irrigation sprinkler
- Irène Joliot-Curie (French scientist)
- Isaac Asimov (Russian-born American author and biochemist) (see under Intellectual positions)
- Isaac Asimov complete bibliography
- Isaac Asimov's Guide to Earth and Space (non-fiction)
- Isaac Newton (English physicist, mathematician, astronomer, philosopher, and alchemist)
- Isaac Newton Group of Telescopes (ING) (in the Canary Islands)
- island (see under Volcanic islands)
- island biogeography
- island dwarfing (in biology)
- island restoration
- islet
- isobar (in meteorology)
- isochore (in a thermodynamic diagram)
- isogon (in meteorology)
- isodrosotherm (in meteorology)
- (isogram) contour line (level set) (isarithm)
- isohel (in meteorology)
- isohume (in meteorology)
- isohyet (in meteorology)
- isohypse (in topography)
- (isopleth) contour map
- isotherm (in meteorology)
- isotope (see under Occurrence in nature)
- isotope geochemistry
- isotope hydrology
- isotropic antenna
- isotropic radiation
- isotropic radiator
- isotropy
- Israel Institute for Biological Research (IBR)
- Israel National Water Carrier
- Istanbul observatory of al-Din
- isthmus
- itai-itai disease (caused by cadmium poisoning)
- Itala Game Reserve (in South Africa)
- Italian bee
- Ituri Rainforest (in the Democratic Republic of the Congo)
- ivory
- (Izmit Earthquake: see) 1999 Izmit, Turkey Earthquake
J
- John F. Kennedy Space Center
- (junk mail) bulk mail
- (junkyard) wrecking yard
K
- Keep America Beautiful
- Keep Britain Tidy
- (killing the Earth) ecocide
- Kyoto Protocol
L
- La Leche League International (LLLI) (breastfeeding affects the dairy industry, which affects the environment)
- La Posta Astro-Geophysical Observatory (in California)
- La Selva Biological Reserve (in Costa Rica)
- La Silla Observatory (in Chile)
- La Vérendrye Wildlife Reserve (in Quebec)
- (lab mouse: see) House Mouse (see under Mice and men and under Mutant and transgenic strains)
- (lab rat: see) House Mouse (see under Mice and men and under Mutant and transgenic strains)
- Labor Day Hurricane of 1935
- Laboratory for Atmospheric and Space Physics (LASP)
- Laboratory for Laser Energetics
- (laboratory-grown meat) in vitro meat (see under Environment)
- Lachine Canal (Canal de Lachine) (through Montreal)
- Lachine Rapids (by Montreal)
- lachrymatory agent (lachrymator)
- (lactivists: see) breastfeeding
- (lacto-ovo vegetarianism) ovo-lacto vegetarianism (to be merged or expanded or deleted or moved to Wiktionary)
- lacto vegetarianism
- ladybird (ladybug) (lady beetle) ("beneficial to organic gardeners")
- lagoon
- Lagos bat virus (causing rabies)
- (Lagrangian point) (Lagrange point) (L-point) (libration point)
- LaGuardia Airport (in New York City)
- Laguna Fire (in California)
- lake (see also list of lakes)
- Lake Albert (Albert Nyanza) (in Africa)
- Lake Athabaska (in Canada)
- Lake Baikal (in Siberia)
- Lake Balkhash (Lake Balqash) (in Kazakhstan)
- lake breakout
- Lake Chad (Lac Tchad) (in Africa)
- lake dwelling
- Lake Edward (in Africa)
- lake effect snow (a snowsquall)
- Lake Erie (in North America)
- Lake Eyre (in Australia)
- Lake freighter (Laker)
- Lake Geneva (in Europe)
- (lake herring) cisco (fish)
- Lake Huron (in North America)
- Lake Kivu (in Africa)
- Lake Ladoga (in Russia near Finland)
- Lake Lucerne (in Switzerland)
- Lake Malawi (originally known as Lake Nyasa, Lake Nyassa and Lake Niassa) (in Africa)
- Lake Manitoba (in Manitoba)
- Lake Maracaibo (in Venezuela)
- Lake Michigan (in North America)
- Lake Michigan-Huron (in North America)
- Lake Nicaragua (in Nicaragua)
- Lake Onega (in Russia near Finland)
- Lake Ontario (in North America)
- lake retention time
- lake stratification
- Lake Superior (Gitchigume) (in North America)
- Lake Superior Lowland (Superior Coastal Plain) (in Wisconsin)
- Lake Superior Provincial Park (in Ontario)
- Lake Superior State Park (in New York)
- (lake surge: see) storm surge
- Lake Tanganyika (in Africa)
- Lake Titicaca (Lago Titicaca) (in South America)
- Lake Victoria (Victoria Nyanza) (in Africa)
- Lake Volta (in Ghana in Africa)
- Lake Winnipeg (in Manitoba)
- Lake Winnipegosis (in Manitoba)
- Lake Zurich (in Switzerland)
- Lakehead Pipeline (Lakehead System) (in North America)
- lamp
- (lampblack) soot (carbon black)
- lamplighter
- lamprey (see under Relation to humans)
- land
- land art (earth art)
- land borders
- (land breeze: see) sea breeze (seabreeze)
- land bridge
- (land classification: see) ecological land classification
- land degradation
- (land depression) depression (geology)
- (land development: see) subdivision (land)
- land economy
- land elevation
- land ethic
- land grant
- land grants in the Swan River Colony (in Australia)
- land hemisphere
- (land incentive: see) Homestead Act (in the US)
- land incentivization (land incentivisation)
- land lab
- land lighthouse
- (land mail) snail mail (paper mail)
- land management
- land measurement
- land ownership and tenure
- (land plant: see) plant
- land reclamation
- land reform (agrarian reform)
- land rehabilitation
- land rights
- land sailing
- (land seaweed: see) Salsola (see under Salsola as invasive species and under Salsola as food)
- (land subdivision: see) subdivision (land)
- land trust (see under Conservation land trusts)
- land use
- land use forecasting
- (land use planning: see) urban planning
- land vehicle
- land yacht
- Landbrukstidende (Norwegian agricultural magazine)
- Landcare Australia
- Landcare Research New Zealand Limited (Manaaki Whenua)
- landfall
- landfill
- (landfill gas: see) natural gas
- landform (see under List of landforms)
- landing
- landing craft
- Landing Craft Utility (LCU) (amphibious)
- landings on other planets
- landline or (main line) (in telephone communications)
- landlocked
- landmass
- landmine
- Landmine Survivors Network
- landscape
- Landscape Arch (in Utah in the US)
- landscape archaeology
- (landscape architect: see) list of landscape architects
- landscape architecture (see same for "landscape design" and for "landscape gardening")
- landscape ecology
- landscape engineering
- landscape maintenance (groundskeeping)
- LandSerf (geographical information system)
- landslide
- Langila (active volcano)
- lantern
- lanternfish
- larger context to habitats of Pachypodium
- (largest buildings in the world: see) world's largest buildings
- (largest cities [within political borders]: see) list of metropolitan areas by population
- largest cities of the European Union by population
- (largest cities of the United States: see) list of United States cities by population
- (largest cities of the world: see) list of metropolitan areas by population
- largest European metropolitan areas
- largest organism
- largest urban areas of the European Union
- larva
- Las Vegas Valley Water District (LVVWD)
- laser (Light Amplification by Stimulated Emission of Radiation)
- laser applications
- laser cooling
- (laser propulsion: see) lightcraft
- laser safety
- laser snow
- laser ultrasonics
- Lassen Volcanic National Park (in California)
- last eruption
- (laughing gas) nitrous oxide (dinitrogen oxide) (dinitrogen monoxide) (a greenhouse gas)
- laurel forest
- Laurentian River System (Ontario)
- (Laurentian Shield) Canadian Shield (Laurentian Plateau)
- lava (see under Towns destroyed by lava and under Towns partially destroyed by lava flows)
- Lava Beds National Monument (in California)
- lava bomb
- lava dome
- lava fountain
- (lava rock: see) igneous rock
- (lava shield: see) shield volcano
- Lava Tree State Monument (in Hawaii)
- lava tube
- (Law of the Sea) United Nations Convention on the Law of the Sea (UNCLOS) (Law of the Sea) (LOS)
- lawn (see under Maintenance and under Criticisms)
- lawn mower (lawnmower)
- (lawn trimmer) string trimmer
- Lawrence Berkeley National Laboratory (LBNL) (in California)
- (laws of nature: see) physical law
- Le Peuple Migrateur (Winged Migration) (The Travelling Birds) (documentary film)
- leach
- leachate
- leaching
- lead (see under Precautions and under Health effects)
- lead paint
- lead poisoning
- lead-acid battery
- leaf
- leaf blower
- leaf mine
- leaf mold
- leafcutter ant
- (leafflower) Phyllanthus
- leafy sea dragon
- League of American Bicyclists (LAB)
- least developed countries (LDCs)
- leaven
- leech
- legality of pet skunks in Virginia
- legionellosis (legionaires' disease) (see under How is legionellosis spread? and under Where is the Legionella bacterium found?)
- Leningrad Zoo
- lenticular cloud
- (Leonid meteor shower) Leonids
- Lepidoptera (second largest order of insects)
- leprosy (Hansen's disease) (an infectious disease)
- (less developed country: see) developing country
- lettuce big-vein disease
- leukemia (leukaemia) (see under Causes)
- Library of Congress Classification:Class G -- Geography. Anthropology. Recreation
- Library of Congress Classification:Class Q -- Science
- Library of Congress Classification:Class R -- Medicine
- Library of Congress Classification:Class S -- Agriculture
- Library of Congress Classification:Class T -- Technology
- lichen (see under Ecology)
- lichenology
- life
- Life and Energy (book)
- life cycle
- life expectancy
- (life ground: see) John McMurtry
- Life on Earth: A Natural History by David Attenborough (television series)
- (life science) biology
- life support system
- life zone
- lifeform
- lifestyle
- lifestyle diseases (alternative medicine)
- light
- (Light Amplification by Stimulated Emission of Radiation) LASER
- (light bulb) incandescent light bulb
- light crude oil
- light industry
- light pollution
- light rail (light rail transit [LRT])
- (light rail in San Diego, California) San Diego Trolley
- (light rail listing) list of light-rail transit systems
- Light Rail Transit
- light railway
- Light Rapid Transit
- (light sail) solar sail
- (light spectrum) electromagnetic spectrum
- light therapy (phototherapy)
- (light water graphite-moderated reactor) RBMK (in the Soviet Union)
- light water reactor (LWR)
- light-dependent reaction
- Light-emitting diode (see under Organic light-emitting diodes (OLEDs))
- lightcraft
- lighter (fire starter)
- lighter (barge)
- lighter than air
- lighthouse (see also list of lighthouses and lightvessels)
- lightning
- lightning rod (lightning protector) (lightning finial)
- lightning safety
- (lightning storm) thunderstorm (T-storm) (electrical storm)
- lightvessel (lightship)
- lime
- lime (mineral)
- limelight
- limestone ("vulnerable to acids, making acid rain a problem")
- limiting factor
- Limits to Growth (book) (and "Limits to Growth: The 30-Year Update")
- limnic eruption (lake overturn)
- limnology
- Limpopo National Park (in Mozambique in Africa)
- Limpopo River (in Africa)
- Lincoln Near-Earth Asteroid Research (LINEAR) (in the US)
- line-of-sight propagation (of electromagnetic signals)
- linen (made from flax)
- liquefied natural gas (LNG)
- (liquid aerosol: see) aerosol
- liquid air
- liquid air cycle engine (LACE)
- (liquid breathing) fluid breathing
- (liquid cooling: see) computer cooling
- liquid cooling for computers
- liquid crystal display (LCD) ("uses very small amounts of electric power")
- liquid fire
- liquid fuels
- liquid helium (used as a cryogenic refrigerant)
- Liquid Hydrocarbon
- (liquid hydrogen) LH2
- liquid limit (of soil) (relevant to landslides)
- (liquid mechanics) fluid mechanics (fluid dynamics)
- (liquid natural gas) liquefied natural gas (LNG)
- (liquid nitrogen: see) nitrogen
- Liquid nitrogen economy (Liquid Nitrogen [LN2] economy)
- liquid oxygen (LOx) (LOX) (Lox)
- liquid rocket
- Liquid Rocket Booster (LRB)
- liquid rocket propellants
- Liquid Smoke ("a relatively natural food ingredient")
- liquid water path
- liquified petroleum gas (liquefied petroleum gas) (liquid petroleum gas) (LPG) (LP gas) (autogas)
- (Lisbon earthquake of 1755) 1755 Lisbon earthquake
- lithium (see under Precautions)
- lithium economy
- lithium ion battery (see under Warning)
- (lithology: see) petrology
- lithosphere
- litter
- (litter basket) dustbin
- (litter bin) dustbin
- litter box (litter tray)
- litterbug
- (littleleaf disease: see) Phytophthora cinnamomi
- littoral
- littoral drift
- Livability Court
- Livable Streets (book)
- live food fish trade
- livestock
- livestock guardian dog
- (living conditions: see) quality of life
- (living foods diet) raw food diet
- (Living Fossil: see) coelacanth
- living fossil
- living machines
- living mulch
- living museum
- Living on Earth (weekly radio program)
- (living organisms: see) organism
- (living standard) standard of living
- living street (home zone)
- living systems theory
- lizard ("chief impact ... on humans is positive")
- Lizard Head Wilderness (in Colorado in the US)
- Lizard Island National Park (in Australia)
- (Lizard Peninsula: see) The Lizard (in the UK) (see under Ecology)
- lizards in Canada
- llanero
- Llano Estacado
- Llano Uplift
- llanos
- loach (scavenger)
- load
- loam (a type of soil)
- lobster (scavenger)
- lobster fishing
- (local economics) community-based economics (community economics)
- Local Emergency Planning Committee (in the US)
- local food
- local lane (collector lane)
- Local Nature Reserve (LNR) (in England)
- locally unwanted land use
- location (geography)
- loch
- Loch Lomond and the Trossachs National Park (in Scotland)
- (lock [canal]: see) canal lock (navigation) (see under Disadvantages)
- (Lockerbie air disaster) Pan Am Flight 103 (Lockerbie bombing) (in Scotland)
- (Lockport [geological formation]: see) Niagara Escarpment (see under Niagara Escarpment#World Biological Reserve)
- locks on the Kennet and Avon Canal (in the UK)
- locks on the River Thames (in the UK)
- locomotion
- locomotive
- locust ("damage to crops")
- locust swarm
- lodge
- Lodgepole Pine ("serious invasive plant in New Zealand")
- lodging
- loess (a type of soil)
- log
- log bridge
- log cabin
- log driving
- log flume
- log home (log house)
- (log road) corduroy road
- (logboat) dugout (boat) (monoxylon)
- logging
- logistic engineering
- Loihi Seamount ("undersea volcano in the Hawaiian archipelago")
- Lolo National Forest (in Montana in the US)
- Loma Prieta earthquake (in California)
- London (see under Geography and climate and under Transport and infrastructure)
- London commuter belt (London Metropolitan Area)
- London Congestion Charge
- London Cycling Campaign
- London deep-level shelters
- (London Horticultural Society: renamed) Royal Horticultural Society
- London sewerage system
- (London Smog Disaster of 1952) Great Smog of 1952
- (London Tube) London Underground (subway system)
- London's Transport Museum
- Long-distance trail (see also list of long-distance footpaths)
- longshore drift (LSD) (littoral drift)
- Long-term Ecosystem Observatory (in New Jersey in the US)
- Long Ashton Research Station (LARS) (in the UK)
- Long Beach earthquake of 1933 (in California)
- (Long Beach Freeway) Interstate 710 (in California)
- Long Valley Caldera (in California)
- longhorn beetle ("Several are serious pests")
- longitudinal waves (compressional waves) (pressure waves)
- longwall mining
- longwave
- longwave radiation
- (longwave transmitter: see) transmitter
- Lorentz National Park (in Indonesia)
- Lorne Greene's New Wilderness (New Wilderness) (television nature documentary series)
- Los Angeles, California (see under Climate and under Seismic activity and under Real Estate)
- Los Angeles Alligator Farm
- Los Angeles Aqueduct
- Los Angeles Basin
- Los Angeles County Arboretum and Botanic Garden
- Los Angeles County Metropolitan Transportation Authority
- Los Angeles River
- Los Angeles Zoo
- (Losangelization: see) urban sprawl (suburban sprawl)
- (loss of habitat: see) habitat destruction
- loudness
- loudspeaker
- loudspeaker acoustics
- lough
- Louisiade Archipelago (southeast of Papua New Guinea)
- Louisiana State Arboretum
- Louisiana Water Resources Research Institute
- Louisville Zoo (in Louisville, Kentucky)
- (Louisville and Portland Canal: renamed) McAlpine Locks and Dam (in Louisville, Kentucky)
- Love Canal (in Niagara Falls, New York)
- low Earth orbit (LEO)
- low explosive
- low floor (in vehicles such as buses, trolleybuses, and trams)
- Low intensity conflict (LIC)
- low island
- low level waste
- low noise amplifier (LNA)
- low pressure area (see same for "low-pressure cell")
- (low water: see) tide
- low-energy house
- (low-energy light bulb: see) compact fluorescent lamp (CFL) (compact fluorescent light bulb)
- low-frequency radar
- low-noise block converter (LNB, for low-noise block) (LNC, for low-noise converter)
- (low-occupancy vehicle: see) single occupant vehicle
- low-power
- low-power broadcasting
- (low-temperature: see) cryogenics
- low-technology
- Lowell Observatory Near-Earth-Object Search (LONEOS)
- (lower explosive limit [LEL]: see) explosive limit
- Lowest Achievable Emissions Rate
- (lowest astrnomical tide: see) chart datum
- (lowest elevations: see) list of places on land with elevations below sea level
- lowest published lethal dose
- lowest safe altitude (LSALT)
- Loy Yang Power Station (in Australia)
- Luarica diamond mine (in Angola)
- lubricant
- Lucens reactor (in Switzerland)
- Luddite
- Ludington Lighthouse (in Michigan in the US)
- Ludington Pumped Storage Power Plant (in Michigan in the US)
- Ludwig Institute for Cancer Research (global)
- lumber (see especially under Preservatives)
- (lumber mill) sawmill
- lumberjack
- lumen (unit)
- luminance
- luminescence
- luminosity
- luminous efficiency
- luminous energy
- luminous flux
- luminous intensity
- luminous paint
- (luminous pollution) light pollution (photopollution)
- (luminous shark) cookiecutter shark (cigar shark)
- (luna [moon]: see) moon
- lunar calendar
- lunar eclipse
- lunar effect
- lunar meteorite
- lunar phase
- (lunar rainbow) moonbow (white rainbow)
- Lunar Society
- lunation
- lunisolar calendar
- lunitidal interval
- lure (see fishing lure)
- lux
- lye
- Lyme disease (Lyme borreliosis) ("an infectious tick-borne disease")
- Lyndon B. Johnson Space Center (JSC)
- lysocline (relevant to global warming)
M
- Maasai (Masai) (a semi-nomadic people in Africa)
- macadam (a type of road construction)
- The MacDiarmid Institute for Advanced Materials and Nanotechnology (the MacDiarmid Institute) (in New Zealand)
- Mach number (Ma)
- machine
- (machine reproduction: see) clanking replicator
- Mackenzie Valley Pipeline Inquiry (in Canada)
- MacRitchie Reservoir (in Singapore)
- macro-engineering (macroengineering) (macro engineering)
- macroecology
- macroinvertebrate
- (macromolecular chemistry) polymer chemistry
- macrosonics
- (mad cow disease) bovine spongiform encephalopathy (BSE)
- Madagascar lowland forests
- Madagascar subhumid forests
- Madeira Wind Birds (eco-tourism company)
- Madrean pine-oak woodlands
- Madrean sky islands
- maelstrom
- Magellanic subpolar forests
- magnet (see under North/South Pole designation and the Earth's magnetic field)
- magnetic fusion energy (MFE)
- magnetic polarity reversal
- magnetic refrigeration
- magnetic resonance imaging (MRI) (magnetic resonance tomography [MRT])
- magnetic sail (magsail)
- magnetic storm (geomagnetic storm)
- magnetic weapon
- magnetism (see under Nano-Structured Magnets)
- magnetite
- Magnetohydrodynamic drive (MHD propulsor)
- (magnetohydrodynamic generator) MHD generator (MHD dynamo)
- magnetohydrodynamics (MHD)
- magnetometer
- magnetopause
- magnetosheath
- magnetosphere
- magnetostriction
- Maharashtra Pollution Control Board (in India)
- (maidenhair tree) ginkgo ("a unique tree with no living relatives")
- mail rocket
- mailbomb (mail bomb) (parcel bomb) (letter bomb)
- mains electricity
- mains hum (electric hum)
- (mains plugs: see) domestic AC power plugs and sockets
- maize (corn) ("widely cultivated throughout the world")
- major coal producing regions
- major stationary source
- major submarine incidents since 2000
- Makara Peak Mountain Bike Park (in New Zealand)
- Malabar Coast moist forests
- (Malagasy rats and mice) Nesomyinae
- malaria
- malaria and the Caribbean
- malarial parasite
- (Malayan Nature Society [Singapore Branch]: renamed) Nature Society (Singapore)
- Mallet locomotive
- Malthusian catastrophe (Malthusian check)
- Malthusianism
- mammal
- mammoth
- Mammoth Cave National Park (in Kentucky)
- (Mammoth Hot Springs: see) geothermal areas of Yellowstone
- Mammoth Mountain (in California)
- Mammoth Spring (in Arkansas)
- man-eating tree
- (man-made diamond) synthetic diamond
- (man-made disaster: see) Category:Man-made disasters
- (man-made disease: see) bioterrorism
- (man-made island) artificial island
- (man-made lake: see) reservoir
- (managed lanes: see) high-occupancy vehicle (HOV)
- management systems for road safety
- Managing Urban America (book)
- Manantali Dam (in Mali)
- Manapouri Power Station (in New Zealand)
- Manas National Park (in India)
- (Manchester air disaster: see) British Airtours Flight 22M
- Manchester Ship Canal (MSC) (in the UK)
- Manchukuo and Mengchiang (agriculture, farming, lumber and fishing)
- mandatory labelling
- Mandla Plant Fossils National Park (in India)
- mandrake (plant) (see under Anæsthesia)
- mangrove (soil retainer, wildlife habitat, windbreak, breakwater)
- Manhattan Project (Manhattan Engineering District)
- manhole (maintenance hole)
- manhole cover
- manhole cover theft
- Manila hemp (manilla) (type of fiber)
- Manila paper
- (manioc) cassava (see under Uses and under Cassava pests)
- (Manistee National Forest: see) Huron-Manistee National Forests (in Michigan)
- Manitoulin Island (in Ontario)
- Manned Orbiting Laboratory (MOL)
- (Manned Space Programs: see) list of human spaceflights by program
- (Manned Spacecraft Center: see) Lyndon B. Johnson Space Center ("JSC")
- (manned spaceflight) human spaceflight
- manometer
- manta ray (giant manta) (Atlantic manta) (Pacific manta) (devil ray) (devilfish) (manta)
- mantle (geology)
- mantle plume
- (manufactured diamond) synthetic diamond
- (manufactured gas) town gas
- manufactured housing (prefab housing)
- manufacturing
- (Manufacturing Belt) Rust Belt (in the US)
- manufacturing resource planning (MRP II)
- (manufacturing waste) industrial waste
- manure
- (Maori wrasse) humphead wrasse (endangered fish)
- map
- maple (source of wood and syrup for humans, and of pollen and nectar for bees)
- maple bug (boxelder bug)
- Maquila Decree
- maquiladora (maquila) ("health and environmental problems have arisen")
- Maquila Solidarity Network (MSN)
- Maquis shrubland
- Marathon Ashland Petroleum (from 2005-09-01, Marathon Petroleum Company)
- Marathon Oil Corporation
- Marble Bar, Western Australia ("believed by some to be the world's hottest place")
- Marburg virus
- March of the Penguins (documentary)
- Marchioness disaster
- (Marconi's Wireless Telegraph Company: see) Guglielmo Marconi
- Marek's disease (in chickens)
- marginal propensity to consume (MPC)
- marginal propensity to save (MPS)
- marginal sea
- Marie Curie (Maria Skłodowska-Curie) (chemist and pioneer in radiology)
- (marijuana: see) cannabis (drug) (listed because of environmental effects of cultivation)
- marina
- Marina Beach (in India)
- marine aquarium
- (marine aquarium fish species: see) list of marine aquarium fish species
- marine biology
- Marine Biology Simulation Case Study (MBSCS)
- marine biomolecule
- marine clay
- marine conservation
- (marine dead zone: see) dead zone
- marine debris
- (Marine Dumping: see) Convention on the Prevention of Marine Pollution by Dumping Wastes and Other Matter
- (marine ecology: see) marine biology
- marine ecoregion
- marine engineering
- (marine farming: see) aquaculture
- (marine geology: see) oceanography
- (marine life: see) marine biology
- (Marine Life Conservation: see) Convention on Fishing and Conservation of Living Resources of the High Seas
- marine life of New York Harbor
- marine mammal
- Marine Modeling and Analysis Branch (MMAB) (in the US)
- Marine Nature Reserve (MNR) (in the UK)
- marine park
- marine pollution
- Marine Protected Area
- (Marine Protected Areas of the United States: see) National Marine Protected Areas Initiative
- (marine reptile: see) list of marine reptiles
- marine reserve
- marine reserves of New Zealand
- marine science
- (marine slip) slipway (boat skip) (slip)
- marine snow
- (marine transport: see) ship transport
- (marine west coast climate: see) oceanic climate (maritime climate)
- (Marine World: renamed) (Marine World Africa USA: renamed) (Marine World Theme Park: renamed) Six Flags Marine World (in California)
- marine worm
- Marine Worm Harvester
- (marine zoology: see) marine biology
- Marineland
- maritime
- Maritime archaeology
- (maritime climate) oceanic climate (marine west coast climate)
- maritime geography
- maritime terrorism
- (maritime transport: see) ship transport
- Mark 117 bomb
- Mark 118 bomb
- Markermeer (in the Netherlands)
- (Markerwaarddijk: see) Zuiderzee Works
- market garden
- market gardening
- marmoset (member of one of several species of monkeys)
- marmot (member of one of several species of rodents)
- Marquesas botany
- Marquesas zoology
- Marquis reagent
- Mars Climate Orbiter
- (Mars colonization) colonization of Mars
- Mars Desert Research Station (MDRS)
- (Mars Direct: see) The Case For Mars: The Plan to Settle the Red Planet and Why We Must (book)
- (Mars exploration) exploration of Mars
- Mars Exploration Rover (MER)
- Mars Express
- Mars Express Orbiter
- Mars Global Surveyor (MGS)
- Mars Gravity Biosatellite
- Mars Habitat Unit
- (Mars meteorite) Martian meteorite
- Mars Observer
- (Mars Odyssey: see) 2001 Mars Odyssey
- Mars Pathfinder
- (Mars Phoenix: see) Phoenix (spacecraft)
- Mars Polar Lander
- Mars probe program
- Mars Radiation Environment Experiment (Martian Radiation Experiment) (MARIE)
- Mars Reconnaissance Orbiter (MRO)
- Mars Rover
- (Mars Sample Return: see) exploration of Mars
- Mars Science Laboratory (or MSL)
- Mars Society
- Mars Surveyor
- Mars Telecommunications Orbiter
- marsh
- (marsh gas: see) natural gas
- Marsh test (for detecting arsenic)
- (marshalling yard) classification yard
- marsupial
- Marwell Zoological Park
- Maryland Conservation Council (MCC)
- (mass burial: see) mass grave
- mass concentration (mascon )
- mass deacidification (of paper in old books)
- mass decontamination (mass decon)
- mass grave
- mass production
- Mass Rapid Transit
- Mass Rapid Transit (Singapore) (MRT)
- (Mass Rapid Transit [Taipei]: see) Taipei Rapid Transit System (TRTS)
- (Mass Rapid Transit Authority of Thailand [MRTA]: see) Bangkok Metro
- mass spectrometry
- (mass transit) Public transport (public transportation) (public transit)
- mass transit in Bucharest
- mass transit in Chicago
- mass transit in New York City
- (Mass Transit Railway) MTR (in Hong Kong)
- (Mass Transit Railway Corporation Limited) MTR Corporation Limited (MTRC) (in Hong Kong)
- (mass transportation) public transport (public transportation) (public transit) (mass transit)
- mass wasting (in geology)
- (mass-energy equation) E=mc²
- Massachusetts Bay Transportation Authority (MBTA)
- Massachusetts Water Resources Authority (MWRA)
- Massasauga Rattlesnake (threatened)
- (massic energy: see) energies per unit mass
- (master-planned community: see) new town
- mastodon
- material
- material safety data sheet (MSDS)
- Materials Recovery Facility (MRF)
- Materials Research Science and Engineering Centers (MRSEC)
- materials science
- mathematical biology (biomathematics)
- mathematical chemistry
- mathematical physics
- Matheson Fire (in Canada)
- (Matilda Highway) Landsborough Highway (in Australia)
- mating
- mating pool
- (mating season: see) estrus cycle (estrous cycle)
- mating system
- Matobo National Park (in Zimbabwe)
- matorral (shrubland)
- Matsumoto incident (in Japan)
- (matter-energy relation: see) E=mc²
- Matthews Range (Mathews Range) (Lenkiyio Hills) (in Kenya)
- Maui Ocean Center (in Hawaii)
- Maui gas field (in New Zealand)
- Mauna Kea (in Hawaii)
- Mauna Kea Observatory
- Mauna Loa (in Hawaii)
- Mauna Loa Observatory (MLO)
- Mauna Loa Solar Observatory (MLSO)
- Max Planck (Max Karl Ernst Ludwig Planck) (physicist)
- (Max Planck Institute) Max-Planck-Gesellschaft
- Max Planck Institute for Bioinorganic Chemistry
- Max Planck Institute for Biophysical Chemistry
- Max Planck Institute of Biochemistry
- maximum sustainable yield (MSY) (in fisheries science)
- (Maxwell's theory of electromagnetism: see) electromagnetism
- (May bug) cockchafer ("pest")
- Mayani bird sanctuary (in India)
- Antillean Giant Rice Rat
- Mazon Creek fossils (near Chicago)
- (McCormick reaper: see) Mazon Creek fossils
- McDonald's (see under Criticism)
- mealworm ("food source" for "pets")
- (mealworm beetle: see) darkling beetle
- mealybug (pest)
- mean flow
- mean high water springs
- mean Radiant Temperature (MRT)
- (mean sea level MSL: see) sea level
- (mean solar time: see) solar time
- (mean tropical year: see) tropical year
- means of production
- means of protection
- measurement
- (Measurements of Pollution in the Troposphere) MOPITT
- measuring instrument
- (measuring well-being: see) quality of life
- meat
- meat analogue (meat analog)
- meat and bone meal (MBM)
- meat coma
- (meat industry: see) livestock
- Meat Inspection Act
- meat packing industry
- (meat recovery system: see) advanced meat recovery (AMR)
- mechanical advantage (MA)
- mechanical efficiency
- mechanical energy
- mechanical engineering
- mechanical equivalent of heat
- mechanical plant (physical plant)
- mechanical work
- mechanically separated meat (MSM) (mechanically recovered meat [MRM])
- mechanically separated poultry (MSP)
- mechanics
- mechanised agriculture
- mechanochemistry
- (median [highway]: see) central reservation
- (median strip: see) central reservation
- mediation (biology)
- medical geology
- medical cannabis
- (medical nanorobotics: see) nanomedicine
- (medical nanotechnology: see) nanomedicine
- medical tourism
- medical waste
- Medical Waste Tracking Act
- medicinal chemistry
- medicinal leech
- (medicinal plant: see) botany
- medicinal tea
- medieval hunting
- Medieval Warm Period (MWP) (Medieval Climate Optimum) (Medieval Climatic Anomaly)
- Mediterranean Basin
- Mediterranean climate
- Mediterranean forests, woodlands, and shrub
- Mediterranean Monk Seal ("endangered")
- Mediterranean recluse spider (introduced to the US)
- Mediterranean Sea
- (medium earth orbit [MEO]: see) intermediate circular orbit (ICO)
- medium-density fibreboard (MDF) ("use of formaldehyde resins")
- megacity (megapolis) (megalopolis)
- megacryometeor
- megafauna
- megamammals
- megalopolis
- megascale engineering
- megastructure
- megathermal (macrothermal)
- megathrust earthquake
- megatsunami
- megawatt (MW)
- megawatt-hour (MW·h)
- melting
- melting point
- melting points of the elements (data page)
- (member [geology]: see) stratum
- Memphis Area Transit Authority (MATA)
- (Mendel: see) Gregor Mendel ("father of genetics")
- Mendel University of Agriculture and Forestry Brno (in the Czech Republic)
- (Mendeleev: see) Dmitri Mendeleev (Russian chemist)
- (Mendeleev periodic table) periodic table
- Mendeleev's predicted elements
- meningitis (see under Causative organisms)
- Mer Bleue Conservation Area (in Ontario, Canada)
- Mercator projection
- merchandization
- mercury (element) (see under Health and Environmental Effects)
- mercury-in-glass thermometer
- mercury-vapor lamp
- Mercy Mercy Me (The Ecology) (song)
- meridian
- Meridian Energy Limited (in New Zealand)
- Merlin diamond mine (in Australia)
- Merritt Island National Wildlife Refuge (in Florida in the US)
- Mount Meru (Tanzania) (volcano)
- mesa (in geology)
- Mesker Park Zoo (in Indiana in the US)
- (mesopause: see) mesosphere
- (mesopelagic zone: part of) pelagic zone
- mesosphere
- (mesospheric cloud: see) noctilucent cloud
- mesothermal (in climatology)
- metabolic theory of ecology
- metagenomics (environmental genomics) (community genomics)
- (metal active gas [MAG] welding: see) gas metal arc welding (GMAW) (metal inert gas [MIG] welding) (see especially under Safety)
- metal foam
- metal fume fever
- metal halide lamp (containg mercury and metals)
- metallurgical engineering
- Metallurgical Laboratory (site of the first self-sustaining nuclear reaction)
- metallurgy
- metalworking
- metamaterial (in electromagnetism)
- metamorphism (in geology)
- metamorphosis (biology)
- Metapneumovirus
- metapopulation
- metastasis
- metavolcanic rock
- meteor (shooting star) (falling star)
- Meteor Crater (Barringer Crater) (in Arizona in the US)
- (meteor impact: see) impact event
- meteor shower
- meteorite
- (meteorite crater: see) impact crater (impact basin) (crater)
- (meteorite impact: see) impact event
- meteorites classification
- Meteoritical Society
- meteoritics
- meteoroid
- Met Office (the UK's national weather service)
- meteorological phenomenon
- (meteorological satellite) weather satellite
- Meteorological Service of Canada (MSC)
- meteorology
- methamphetamine (see under Production)
- methane
- methanogen
- methanogenesis
- methanol
- (methanol car: see) liquid fuels
- methanol chemdata supplement
- methanol economy
- (methanol fuel: see) liquid fuels
- (methanol fuel cell: see) direct-methanol fuel cell (DMFC)
- Methicillin-resistant Staphylococcus aureus (MRSA) ("superbug")
- metric system
- metric system in the United States
- metrication (metrification)
- (metro: see) rapid transit
- Metro Toronto and Area Conservation Authority (MTACA)
- Metrobus
- Metrology
- metropolis
- Metropolitan Transit
- (Metropolitan Transit Authority) MTA
- Metropolitan Transit Authority of Harris County, Texas (METRO)
- (Metropolitan Transit Authority of New York City: see) New York City Transit Authority (NYCTA) (NYCT) (the TA)
- Metropolitan Transit Commission
- (Metropolitan Transportation Agency [MTA]: see) Agence métropolitaine de transport (AMT)
- Metropolitan Transportation Authority (New York)
- Metropolitan Transportation Commission (San Francisco)
- Metropolitan Travel Survey Archive
- Metropolitan Water District of Southern California
- (Meudon Observatory: see) Paris Observatory (Observatoire de Paris) (Observatoire de Paris-Meudon)
- Mexico City (see under Urban Problems)
- Miami Tornado (of May 12, 1997)
- Miami tornadoes of 2003
- Miami-Dade Transit
- Michael Faraday (a British scientist--a physicist and chemist)
- Michigan left (Michigan left turn) (Superstreet)
- (micro [transport]: see) public transport in Lima
- Micro Air Vehicle (MAV)
- (Micro Combined Heat and Power) MicroCHP
- (Micro Electro-Mechanical Systems) MEMS
- (micro-hydropower: see) hydropower (see under Small scale hydro power)
- (microballoon) glass microsphere
- microbial ecology
- (microbial fuel cell) biological fuel cell
- microbicide
- microbiology
- microbolometer (for measuring electromagnetic radiation)
- microcar
- microchip (animal identification)
- microclimate
- microorganism (microbe)
- (micropower broadcasting) low-power broadcasting (microbroadcasting)
- microelectronics
- microfiber
- microfiltration
- (microgravity: see) weightlessness
- microgravity environment
- (microhabitat: see) habitat (ecology)
- micromachinery
- microscope
- microsound
- microspacecraft
- Microtechnology
- (microturbine: see) gas turbine (see under Micro turbines)
- microwave (radiation)
- microwave auditory effect ("Frey effect")
- (microwave background radiation: see) cosmic microwave background radiation (CMB)
- microwave chemistry
- microwave effect
- (microwave laser: see) maser
- microwave oven (see under Safety and controversy)
- microwave plasma
- microwave power meter
- microwave power transmission (MPT)
- microwaving
- Mid-Atlantic Ridge
- mid-ocean ridge (mid-oceanic ridge)
- mid-size car
- middle latitudes
- midnight
- (migrating birds: see) bird migration
- migration
- Migratory Bird Treaty Act of 1918
- migratory locust
- Milan Transportation System (in Italy)
- Milankovitch cycles (in climatology)
- Millau Viaduct (le Viaduc de Millau) (in France) ("the tallest vehicular bridge in the world")
- mildew ("a grey, mold-like growth")
- mile-a-minute weed (Devil's tail tearthumb) (Asiatic tearthumb)
- militarisation of space
- militarism
- military
- military animals
- military dolphin
- Military Geology Unit
- milk
- (milkweed) Asclepias
- mill
- Millennium Development Goals (by the UN) (see under Ensure environmental sustainability)
- Millennium Ecosystem Assessment (MA)
- miller
- Miller cycle (in engine design)
- (milliequivalent: see) equivalent (chemistry)
- milligram per litre (milligram per liter) (mg/L)
- millimeter cloud radar (millimeter wave cloud radar) (MMCR)
- (millimeter of mercury [mmHg]) torr (unit of pressure)
- millstone
- mill town
- Milne Ice Shelf
- (milo maize: see) sorghum ("drought tolerant and heat tolerant")
- mine
- (Mine Ban Treaty) Ottawa Treaty (Convention on the Prohibition of the Use, Stockpiling, Production and Transfer of Anti-Personnel Mines and on their Destruction)
- mine closure
- mine closure planning
- (mine explosion: see) mining accidents
- mine fire
- mine plow (military)
- mine reclamation
- mine roller (military)
- Mine Safety and Health Administration (MSHA) (in the US)
- (minefield: see) landmine
- (Miner's Safety Lamp) Davy lamp
- mineral
- (mineral fuel) fossil fuel
- mineral oil
- mineralogy
- (miners' anaemia: see) hookworm
- minesweeper (ship)
- Mingan Archipelago National Park Reserve (in Quebec)
- miniaturized satellite
- mining
- mining accident
- Mining Act of 1872 (in the US)
- mining engineering
- mining in Limburg
- Mining the Sky: Untold Riches from the Asteroids, Comets, and Planets (book)
- (minipark: see) pocket park
- minipreparation (miniprep) ("one lab application of this ... [involves] ... antibiotic resistance")
- minisatellite
- Minister for Transport
- Minister of Agriculture
- Minister of Agriculture (Canada)
- Minister of Agriculture, Fisheries and Food
- Minister of Agriculture, Forestry and Fisheries (Japan)
- Minister of Consumer Protection, Food and Agriculture (Germany)
- Minister of Energy, Mines and Resources (Canada)
- Minister of Fisheries and Oceans (in Canada)
- Minister of Land, Infrastructure and Transport (Japan)
- Minister of Natural Resources (Canada)
- Minister of Public Safety and Emergency Preparedness (in Canada)
- Minister of Railways and Canals (Canada)
- (Minister of the Environment: see) list of ministers of the environment
- Minister of the Environment (Canada)
- Minister of the Environment (Japan)
- Minister responsible for the Canadian Wheat Board
- Ministry for Atomic Energy (Russian Federation)
- Ministry for the Environment (in New Zealand)
- Ministry of Agriculture
- Ministry of Agriculture and Food (Ontario)
- (Ministry of Agriculture and Forestry [in New Zealand]: see) New Zealand Ministry of Agriculture and Forestry
- Ministry of Agriculture, Fisheries and Food (in the UK)
- Ministry of Agriculture, Forestry and Fisheries (Japan)
- Ministry of Energy (Ontario)
- Ministry of Extraordinary Situations (Russian Federation) (EMERCOM) (Ministry of the Russian Federation for Civil Defense, Emergencies and the Elimination of the Consequences of Natural Disasters)
- Ministry of Land, Infrastructure and Transport (Japan)
- Ministry of Natural Resources (Ontario)
- Ministry of Northern Development and Mines (Ontario)
- Ministry of the Environment (Japan)
- Ministry of the Environment (Ontario)
- Ministry of Transportation (Ontario)
- mink oil
- Minnesota Experimental City
- Minnesota Glacier
- Mir Space Station (see under Names)
- Miracle Planet (five-part documentary series)
- miscellaneous topics on cities and population
- (misdirected lighting: see) light pollution (photopollution) (luminous pollution)
- Mississippi Alluvial Plain
- Mississippi Delta
- Mississippi River (see under Watershed)
- Mississippi River-Gulf Outlet Canal
- (Missouri Plateau: see) Coteau du Missouri
- Missouri River
- (Missouri River Basin Project: renamed) Pick-Sloan Missouri Basin Program
- Missouri River Trench
- mist
- (Misti Volcano) El Misti (in Peru)
- miticide
- mitigation of global warming
- mitotoxin
- Mitsubishi (see under Problems)
- (mixed expressway: see) RIRO expressway
- mixed oxide
- mixed oxide fuel (MOX fuel)
- mixed waste
- MnDOT traffic cameras
- (mobile garbage bin) wheelie bin
- mobile phone radiation and health
- mobile phones on aircraft
- (mobile power: see) power
- Mobility 2030
- mode of transport
- modified atmosphere (of packages) (see under Packaging Films)
- (Mohave Desert) Mojave Desert
- Mohring effect (in public transit systems)
- (moist adiabatic lapse rate: see) adiabatic lapse rate (in meteorology)
- (moist grain crimping) grain crimping
- moisture
- (moisture in the soil) soil moisture
- moisture ratio
- Mojave Desert (Mohave Desert)
- Mojave Freeway (previous name: Barstow Freeway)
- Mojave National Preserve
- Mojave Spaceport (Mojave Airport and Civilian Flight Test Center)
- Mojave phone booth (with "environmental impact")
- Mojave yucca (see "typically grows" and see under Uses)
- molecular biology
- molecular ecology
- molecular engineering
- molecular nanotechnology (MNT)
- molten salt reactor
- Molten Salt Reactor Experiment
- molten-carbonate fuel cells (MCFCs)
- Monarch butterfly (see "drastic reduction in ... population")
- monetary reform
- (monk seal) Monachus
- (Caribbean Monk Seal: "extinct")
- (Hawaiian Monk Seal: "endangered")
- (Mediterranean Monk Seal: "endangered")
- monkeypox (virus)
- Mono-Inyo Craters (in California)
- monoculture (see under Agriculture)
- monogenetic volcanic field
- monopropellant
- monorail
- monotreme
- Monsanto
- Monsanto Canada Inc. v. Schmeiser
- (monster wave) freak wave (rogue wave)
- montane grasslands and shrublands
- (Monte Carlo N-Particle Transport Code) MCNP (in nuclear energy)
- Montezuma Marsh (in New York state)
- Montezuma National Wildlife Refuge (in New York state)
- (Monthly Mumbai Weather: see) weather of Mumbai
- Montreal Biodome
- (Montreal Botanical Garden) Jardin botanique de Montréal
- (Montreal commuter trains: see) Agence métropolitaine de transport (AMT) (Metropolitan Transportation Agency [MTA])
- Montreal Insectarium
- Montreal Metro (see under Trains: "Rubber tires ... less energy consumption")
- Montreal Protocol on Substances That Deplete the Ozone Layer
- Monument to the Great Fire of London
- moon (see under Orbit and under Eclipses: "tides")
- moon landing
- (moon landing hoax: see) Apollo moon landing hoax accusations (see under Ionizing radiation and Heat)
- moon rocks
- moonlight
- moonquake
- Moorgate tube crash (in London, England)
- Moorten Botanical Garden and Cactarium (in California)
- moose test
- moral purchasing
- moray eel (see "toxin" and "fishery")
- morgue (mortuary)
- morphodynamics
- (mortality rates arising out of the European colonization of the Americas: see) population history of American indigenous peoples (see under Depopulation from disease)
- Moscow State Forest University (MSFU)
- Moscow Zoo
- mosquito (see under Mosquitoes and health)
- mosquito net
- (mosquito trap: see) bug zapper
- moss (see under Cultivation): "considered a weed in grass lawns"
- MOT test (of vehicles) (including "exhaust gases emission test")
- moth (see under Economic significance of moths)
- mothball
- Mother Earth
- Mother Earth News
- Mother Nature
- Mothers Organized to Stop Environmental Sin (MOSES) (based in Texas)
- motor
- motor oil
- motor vehicle
- (motor vehicle accident) car accident (traffic accident) (auto accident) (road accident) (road traffic accident)
- motorcycle (motorbike) (see under Noise Pollution)
- motorway
- mound-building termites
- Mount Etna ("active volcano") (in Italy)
- Mount Everest (highest mountaon on Earth) (between Nepal and Tibet)
- Mount Kilimanjaro ("volcano ... active") (in Tanzania)
- Mount Pinatubo ("active volcano ... in the Philippines")
- Mount St. Helens ("active stratovolcano") (in the US)
- Mount St. Helens National Volcanic Monument
- Mount Weather Emergency Operations Center (in Virginia in the US)
- mountain bike (mountain bicycle) (ATB) (All Terrain Bicycle)
- (mountain building) orogeny
- Mountain Gorilla (Gorilla beringei beringei) ("endangered")
- mountain pine beetle
- mountain range
- mountain rescue
- mountain unicycling (MUni)
- mountaineering
- mouse ("mice can ... be harmful pests")
- mousetrap
- (moving sidewalk) escalator (moving walkway) (slidewalk) (travelator) (travellator) (trav-o-lator) (see under Longest escalators and systems)
- mower
- muck (soil) (see "muck farming")
- mud
- mud dauber (member of one of several species of wasps)
- (mud engineer: see) drilling mud
- (mud nest builders) Corcoracidae (Corcorachidae?) (member of either of two species of birds)
- mud season
- mud volcano (mud dome)
- mud-terrain tyre
- mudbrick
- mudflat
- mudslide
- Mugger Crocodile
- multi-purpose vehicle (MPV)
- (multi-use path: see) segregated cycle facilities
- multigenomic organism
- multilevel streets in Chicago (see "sewers and proper drainage")
- multiple chemical sensitivity (MCS) (20th Century Syndrome) (Environmental illness) (Sick Building Syndrome) (Idiopathic Environmental Intolerance) (IEI)
- multiple cropping
- (Multiple Mirror Telescope) MMT (in Arizona)
- multiple-effect evaporator
- multiplex (road) (concurrency)
- Multipurpose Laboratory Module (MLM) (for the International Space Station [ISS])
- (Mumbai floods of 2005) 2005 Maharashtra floods
- Mumbai's water sources
- Mumbai-Pune Expressway
- mummy
- municipal solid waste (MSW)
- (municipal water supply: see) water supply network
- (municipal water system: see) water supply network
- (municycling: see) mountain unicycling (MUni)
- (munitions dump) ammunition dump (ammunition compound) (ammo dump)
- (Musa textilis) abaca (plant grown for its fiber)
- muscazone (toxin)
- Muséum national d'Histoire naturelle (MNHN) (the French national museum of natural history)
- (Museum für Naturkunde) (Museum of Natural History) Humboldt Museum (in Berlin)
- Museum of English Rural Life (in Reading, England)
- Museum of Garden History (in London, England)
- Museum of Natural History ("many ... around the world")
- mushroom (see under Chemical properties)
- mushroom cloud (from a very large explosion)
- (mushroom compost) spent mushroom compost
- mushroom hunting (mushrooming)
- mushroom poisoning
- mushroom rocks (pedestal rocks)
- music
- music and the brain (see under Music in the Animal Kingdom)
- music therapy (musicotherapy)
- musical acoustics (music acoustics)
- (musical aesthetics) aesthetics of music
- musical instrument
- musical instrument classification
- mustard gas (HD)
- mutagen
- mutation (see under Causes of mutation)
- mutual assured destruction (MAD)
- muzak
- My Inventions: The Autobiography of Nikola Tesla (book)
- mycology (the study of fungi)
- mycotoxin
- myrmecology (the study of ants)
N
- (Nagasaki and Hiroshima: see) atomic bombings of Hiroshima and Nagasaki
- nail bomb
- Namib Desert
- Nanjing Agricultural University
- Nanjing Botanical Garden, Mem. Sun Yat-Sen
- Nanjing Yangtze River Bridge
- nano cubes (fish tanks)
- nano reef
- nano-emissive display
- nanoarchaeum
- nanobacterium
- nanobe
- nanobiotechnology
- (nanocrystal: see) quantum dot
- nanocrystalline silicon
- (nanocrystallites: see) quantum dot
- (nanoelectromechanical systems) NEMS
- nanoengineering
- nanofactory
- (nanogram: see) kilogram
- nanokernel
- nanoliter
- nanolithography
- (nanomachine: see) nanotechnology
- (nanomaterial: see) nanotechnology
- nanomedicine
- Nanomedicine (book)
- (nanometer: see) metre
- nanomorph
- nanomotor
- nanoparticle
- nanopore
- nanopore sequencing
- (nanopotentiometry: see) scanning voltage microscopy (SVM)
- nanorobot
- nanorobotics
- nanoruler
- (nanosatellite: see) miniaturized satellite
- nanoscientist
- nanosensor
- nanoshell
- nanosocialism
- (nanospray: see) electrospray ionization (ESI)
- nanotechnology (see under Potential risks)
- nanotechnology education
- nanotoxicity
- (nanotube: see) carbon nanotube
- (nanotubule: see) carbon nanotube
- nanowire
- napalm
- (napalm girl: see) Kim Phuc Phan Thi
- naphtha
- naphthalene (naphthalin) (naphthaline) (tar camphor) (white tar) (albocarbon) (naphthene)
- Napier earthquake
- Narragansett Bay National Estuarine Research Reserve
- narrow gauge (measurement of railways)
- (narrow lanes: see) wide outside lane (WOL) (wide curb lane [WCL])
- narrowboat
- Naruto whirlpool
- (nasal allergies) hay fever (pollinosis) (allergic rhinitis)
- Nasdaq Biotechnology Index
- National Aeronautics and Space Act
- (National Aeronautics and Space Administration) NASA
- National Aerospace Laboratories (in India)
- (National Aerospace Laboratory of Japan: see) Japan Aerospace Exploration Agency (JAXA)
- National Agricultural Library (in the US)
- National Agricultural Statistics Service (NASS) (in the US)
- National Ambient Air Quality Standards (NAAQS) (in the US)
- National Aquarium (in the US)
- National Association of State Park Directors (NASPD) (in the US)
- National Bamboo Project of Costa Rica
- National Center for Atmospheric Research (NCAR) (in the US)
- National Center for Biotechnology Information (NCBI) (in the US)
- National Center for Hydrogen Technology (NCHT) (in the US)
- (National Centers for Disease Control: see) Centers for Disease Control and Prevention (CDC)
- National Centers for Environmental Prediction (in the US)
- National Chemical Laboratory (in India)
- National Climatic Data Center (NCDC) (in the US)
- National Coal Board (NCB) (in the UK)
- National Coastwatch Institute (in the UK)
- National Commission on Marihuana and Drug Abuse (in the US) (listed because of environmental effects of cultivation)
- National Conservation Area (in the US)
- National Corn Growers Association (NCGA) (in the US)
- National Defense Research Committee (NDRC) (in the US)
- National Earthquake Information Center (NEIC) (in the US)
- National Emissions Standards for Hazardous Air Pollutants (NESHAPS) (in the US)
- National Energy Act (in the US)
- National Energy Action (NEA)
- National Energy Conservation Policy Act (NECPA) (in the US)
- National Energy Program (NEP) (in Canada)
- National Energy Technology Laboratory (NETL) (in the US)
- National Environment Agency (NEA) (in Singapore)
- National Environmental Directory (in the US)
- National Environmental Policy Act (NEPA) (in the US)
- National Environmental Protection Act
- (National Environmental Satellite, Data and Information Service: see) National Oceanic and Atmospheric Administration (NOAA) (in the US)
- (National Estuarine Research Reserve: see) U.S. National Estuarine Research Reserve
- (National Farm Workers Association: see) United Farm Workers (in the US)
- National Farmers Union (in various countries)
- (National Federation of Coffee Growers of Colombia) Federación Nacional de Cafeteros de Colombia
- National Fire Protection Association (NFPA) (in the US)
- National Fish Hatchery System (in the US)
- National Fluid Power Association (NFPA) (in the US)
- (National Forest: see) U.S. National Forest
- National Forest, England
- National Forest Act (in the US)
- National Forest Adventure Pass (in the US)
- (National Forest Service: see) United States Forest Service
- National Garden Festival (in the UK)
- National Gardens Scheme (in the UK)
- (National Geodetic Survey: see) U.S. National Geodetic Survey
- (National Geographic [Magazine]: see) National Geographic Society
- National Geographic Bee (in the US)
- National Geographic Channel
- National Geographic Kids (magazine)
- National Geographic Society (in the US)
- National Geographic Society - Palomar Observatory Sky Survey (NGS-POSS)
- National Geomagnetism Program (in the US)
- National Geophysical Data Center (NGDC) (in the US)
- National Geospatial-Intelligence Agency (NGA) (in the US)
- (National Grange: see) grange movement
- National Grassland (in the US)
- National Grid (for electric power transmission) (in Great Britain)
- National Grove of State Trees (in the US)
- National Hay Association
- (National Highway: see) Indian highways
- National Highway (Australia)
- National Human Genome Research Institute (NHGRI) (in the US)
- National Hurricane Center (in the US)
- National Institute for Environmental eScience (NIEeS) (in the UK)
- National Institute for Occupational Safety and Health (NIOSH) (in the US)
- National Institute of Allergy and Infectious Diseases (NIAID) (in the US)
- National Institute of Building Sciences (NIBS) (in the US)
- National Institute of Environmental Health Sciences (NIEHS) (in the US)
- (National Institute of Nuclear and Particle Physics) Institut National de Physique Nucléaire et de Physique des Particules (in France)
- National Iranian Oil Company
- (National Lakeshore: see) U.S. National Lakeshore
- National Lubricating Grease Institute (NLGI)
- (National Manufacturers Association: see) National Association of Manufacturers (NAM) (in the US)
- National Map (in the US)
- National Marine Aquarium, Plymouth, England
- National Marine Fisheries Service (NMFS) (in the US)
- National Marine Fisheries Service, Office of Law Enforcement (in the US)
- National Marine Mammal Laboratory (in the (US)
- National Marine Protected Areas Initiative (in the US)
- (National Marine Sanctuary: see) U.S. National Marine Sanctuary
- National Microbiology Laboratory (NML) (in Canada)
- National Missile Defense (NMD) (in the US)
- National Museum of Natural History (in the US)
- National Nanotechnology Initiative (in the US)
- National Natural Landmark (NNL) (in the US)
- (National Naturalists' Society of Wales) Cymdeithas Edward Llwyd
- National Nature Reserve (in the UK)
- National Non-Smoking Week (in Canada)
- National Oceanic and Atmospheric Administration (NOAA) (in the US)
- National Oceanographic Data Center (NODC) (in the US)
- National Oceanography Centre, Southampton (NOCS) (in the UK)
- National Oil and Hazardous Substances Contingency Plan (NOHSCP/NCP) (in the US)
- National Optical Astronomy Observatory (NOAO)
- National Organic Program (NOP) (in the US)
- national parkway (in the US)
- (National Pharmaceutical Stockpile: see) Strategic National Stockpile (SNS) (in the US)
- National Plant Pest Accord (in New Zealand)
- National Ploughing Championships (in Ireland)
- (National Population Register: see) Citizen Information Project (in the UK)
- National Power Corporation (in the Philippines)
- National Primitive Area (in the US)
- National Radio Astronomy Observatory (NRAO) (in the US)
- National Radiological Protection Board (in the UK)
- (National Reactor Testing Station [NRTS]) Idaho National Laboratory (INL) (in the US)
- (National Reclamation Act of 1902) Newlands Reclamation Act (Reclamation Act) (in the US)
- (National Recreation Area) U.S. National Recreation Area
- National Register of Historic Parks and Gardens (in the UK)
- National Renewable Energy Laboratory (NREL) (in the US)
- National Scenic Area
- National Scenic Trail (in the US)
- National Science Foundation (NSF) (in the US)
- National Sea Life Centre (Birmingham) (in the UK)
- (National Severe Storms Forecast Center [NSSFC]: renamed) Storm Prediction Center (SPC) (in the US)
- National Severe Storms Laboratory (NSSL) (in the US)
- National Snow and Ice Data Center (NSIDC) (in the US)
- National Solar Observatory (in the US)
- National Speleological Society (in the US)
- National Superconducting Cyclotron Laboratory (in the US)
- National Taiwan Ocean University
- National Thermal Power Corporation (in India)
- (National Toxicology Program: see) National Institute of Environmental Health Sciences (NIEHS) (in the US)
- National Tropical Botanical Garden (in the US)
- National Undersea Research Program (of the US)
- National Vegetation Classification (NVC)
- National Weather Center (in the US)
- (National Wilderness Area: see) U.S. Wilderness Area
- National Wildlife Federation (in the US)
- National Wildlife Refuge (in the US)
- (National Zoo: see) Smithsonian National Zoological Park (in the US)
- National Zoological Gardens of South Africa
- (Native American depopulation: see) population history of American indigenous peoples
- native copper
- Native Forest Action (NFA) (in New Zealand)
- Native Forest Action Council (in New Zealand)
- Native Forest Council (in the US)
- Native Forest Restoration Trust (in New Zealand)
- native plant
- native planting
- Natura 2000 (in Europe)
- natural
- Natural Area Code (system for representing areas and locations)
- natural capital
- natural capitalism
- natural causes (disambiguation)
- (natural climate variability: see) climate change
- natural disaster
- natural environment
- Natural Environment Research Council (NERC) (in the UK)
- (natural flavor: see) flavouring
- Natural Foods Diet
- natural gas
- natural gas condensate
- natural gas field
- natural gas liquids
- natural gas vehicle (NGV)
- natural harbor
- (natural hazard: see) natural disaster
- Natural History (magazine)
- Natural History Museum (in the UK)
- (Natural History Museum, Vienna: see) Naturhistorisches Museum
- Natural History Museum of Los Angeles County
- (natural host: see) natural reservoir (nidus)
- Natural Hygiene (see under Theories pertaining to medicines)
- natural killer cell (NK cell)
- natural medicine
- (natural nuclear fission reaction: see) Oklo
- (natural nuclear fission reactor: see) nuclear reactor (see under Natural nuclear reactors)
- natural phenomenon
- (natural pigment: see) pigment
- (natural population decrease: see) sub-replacement fertility
- (natural product) secondary metabolite (see "importance ... of ecological nature" in text of article)
- (natural range: see) range (biology)
- natural reactor
- natural region
- natural reservoir (nidus)
- natural resource
- (Natural Resources Canada: see) Department of Natural Resources (Canada)
- Natural Resources Conservation Service (NRCS) (in the US)
- Natural Resources Defense Council (NRDC)
- natural resources of Primorsky Krai (in Russia)
- (natural rubber: see) rubber
- natural satellite
- natural science
- Natural Sciences and Engineering Research Council (NSERC) (in Canada)
- Natural Sciences at Cambridge (in the UK)
- natural sounds
- natural therapy
- Natural World (television series in the UK)
- (Natural World Heritage: see) World Heritage Site
- (naturalarian: see) Natural Foods Diet
- (Naturalis Historia: see) Pliny's Natural History
- naturalisation (biology)
- naturalist
- naturally-aspirated engine
- nature (the material world) (the material universe) (the natural world) (the natural universe)
- Nature (journal)
- Nature (television)
- Nature Clinical Practice Oncology (journal)
- (Nature Conservancy: see) The Nature Conservancy (organization)
- Nature Conservancy of Canada
- Nature Heritage Fund (in New Zealand)
- (Nature of Things: see) The Nature of Things (Canadian television series)
- Nature Publishing Group (NPG)
- nature reserve
- Nature Society (Singapore)
- Nature's Classroom
- Nature's services
- Naturefriends (international movement)
- Naturejobs (science job site)
- Natureland Seal Sanctuary (in the UK)
- Naturhistorisches Museum (in Austria)
- (Naturhistoriska riksmuseet) Swedish Museum of Natural History
- naturopathic medicine (naturopathy)
- Naturpark Kottenforst-Ville (nature preserve in Germany)
- nautical almanac
- nautical archaeology
- Nautilus (1800 submarine)
- Nautilus (disambiguation)
- Navajo Generating Station
- naval mine
- navigation (determination of position and direction)
- navigation (disambiguation)
- (navigation satellite: see) satellite navigation system
- (Nazi atomic bomb: see) German nuclear energy project
- (Near Earth Asteroid Rendezvous: see) NEAR Shoemaker
- Near Earth Asteroid Tracking (NEAT)
- Near Field Infrared Experiment (NFIRE)
- (Near Infrared: see) Infrared (IR)
- Near Infrared Camera and Multi-Object Spectrometer (NICMOS)
- Near infrared spectroscopy (NIR)
- (near ultraviolet: see) ultraviolet (UV)
- (near UV: see) ultraviolet (UV)
- Near-Earth asteroid (NEA)
- Near-Earth object (NEO)
- Near-Earth Supernova
- Nearctic (ecozone)
- (nearest stars: see) list of nearest stars
- nectar
- nectar source
- needle dam
- neem (see under (Ecology)
- neem oil (see under "Uses")
- Negative Population Growth (NPG)
- negative pressure
- negative temperature
- negative thermal expansion (NTE) (compare article on ice: see "an unusual feature")
- neighborhood electric vehicle (NEV)
- Neil Armstrong (first human to walk on the Moon)
- (nematode: see) roundworm
- neo-luddism (see especially under GMO)
- Neolithic Revolution
- neon (see especially under Applications)
- neon lamp
- neontology
- neoplasia
- Neoprene (trade name for family of rubbers)
- Neotropic (ecozone)
- nephology
- nephoscope
- neptunium
- neritic zone
- nerve agent (nerve gas)
- nest
- Nestlé boycott (see under Other Nestlé operations targeted)
- net energy gain (NEG)
- nettle (see "stinging hairs" and see under Uses)
- (nettle rash) urticaria (uredo)
- networks (see especially under Transport and infrastructure)
- neurochemistry
- neuroradiology
- neuroscience
- neurotoxicity
- neurotoxin
- neutralisation (immunology)
- Nevada Power Company
- (Nevada Proving Ground: renamed) Nevada Test Site
- Nevada Test Site (for testing of nuclear weapons)
- new car smell
- New Forest (area in England)
- (new health measures: see) health measures during the construction of the Panama Canal
- (New Jersey jughandle) jughandle (a type of ramp for traffic)
- New London School explosion
- New Madrid Earthquake
- New Madrid Seismic Zone (Reelfoot Rift) (New Madrid Fault Line)
- New Mexican locust (New Mexico locust) (shrub or small tree)
- new moon
- New Naturalist (a series of books)
- (New Orleans disaster relief: see) Hurricane Katrina disaster relief
- New Quebec Crater (Ungava-Quebec Crater)
- New Synergies in Development (NSD) (non-governmental organization)
- New Technology Telescope (NTT)
- New Urbanism (urban design movement)
- New World Order
- New World Order (conspiracy)
- New World Order (political)
- New World rats and mice
- New World vulture
- New York City (City of New York) (see under Transportation)
- New York City blackout of 1977
- New York City Department of Parks and Recreation
- New York City landmark bomb plot
- New York Power Authority (NYPA)
- New York State Agricultural Experiment Station
- New York weevil
- New Zealand birds
- New Zealand Ecological Restoration Network (NZERN)
- New Zealand foreshore and seabed controversy
- New Zealand Forest Service
- New Zealand plants
- New Zealand Speleological Society (NZSS)
- (New Zealand trees: see) list of trees of New Zealand
- Newcastle disease (bird disease)
- Newcomen steam engine
- Newfoundland Power
- newly industrialized countries (NICs)
- newspaper (see under The future of newspapers)
- Newspaper Preservation Act of 1970
- newsprint
- newt ("many newts produce toxins")
- Newton's laws of motion
- Newtonian telescope
- (Next Generation Space Telescope [NGST]: renamed) James Webb Space Telescope(JWST)
- Niagara Falls
- Niagara Falls, New York
- Niagara Falls, Ontario
- Niagara River
- Niagara-Mohawk power grid
- Nicaragua Canal
- Nicaraguan Institute of Natural Resources and the Environment (IRENA)
- Nicholas School of the Environment and Earth Sciences
- nickel metal hydride (NiMH) (battery)
- nickel-cadmium battery (NiCd) (NiCad)
- nickel-iron battery
- Nicobar Islands (see under Ecology
- (Nicobar Islands earthquake: see) 2004 Indian Ocean earthquake
- Nicorette (branded palliative treatment for quitting smoking)
- nicotine
- nicotine gum
- nicotine patch
- nicotine poisoning
- nicotine replacement therapy (NRT)
- Niels Bohr
- Niels Bohr Institute
- Niels Bohr Institute for Astronomy, Geophysics and Physics
- Niger Delta (Oil Rivers)
- Niger Delta Field
- Niger Inland Delta
- Niger River
- Nigerian Oil Crisis
- night sky
- night soil
- nightlight (with low wattage)
- Nikola Tesla
- Nile (see especially under Flooding)
- Nile crocodile (see especially under Environmental status)
- Nile Delta
- Nilometer (for measuring the Nile River)
- nimbus cloud
- Nine Planets (web site)
- Nippon Oil Corporation (NOC)
- Nisqually earthquake
- nitrate
- Nitrate Vulnerable Zone
- nitrite
- nitrogen (see under Biological role)
- nitrogen cycle
- (nitrogen fertilizer: see) fertilizer
- (nitrogen pollution: see) eutrophication
- nitrogenomics
- nitroglycerin (nitroglycerine) (trinitroglycerin) (glyceryl trinitrate)
- no man's land
- no-dig gardening
- no-till farming
- Noah
- Noah's Ark
- noble gas
- noble gas compound
- noble metal
- noctilucent cloud
- nocturnal animal
- nodding donkey (beam pump) (rod pump) (grasshopper) (pump jack) (jack pump)
- noise
- noise (environmental)
- (noise cancellation) active noise control (active noise reduction [ANR]) (antinoise)
- noise music
- noise-cancelling headphone
- noise pollution (see also list of noise topics)
- (noisemaker: see) firecracker
- nomad
- (non-breeding range: see) range (biology)
- (non-conventional energy: see) renewable energy (sources) (RES)
- non-conventional oil
- (non-eco-friendly lighting: see) light pollution (photopollution) (luminous pollution)
- (non-essential amino acid: see) essential amino acid
- (non-human animal-powered transport: see) animal powered transport
- non-industrial water filtration
- non-ionising radiation
- (non-migratory: see) bird migration
- non-motorized vehicle access on freeways
- (non-proliferation treaty: see) Nuclear Non-Proliferation Treaty (NPT)
- non-renewable energy
- (non-renewable resources: see) natural resource
- non-vascular plant
- non-woven textiles
- noncoding DNA
- (nondurable good: see) durable good
- (nonmagnetic: see) magnetism
- nori (some "edible varieties of seaweed")
- (noria) water wheel (waterwheel) (Norse mill) (Persian wheel)
- (normal flora: see) bacteria in the human body
- normal temperature and pressure
- NorskeCanada (pulp and paper company)
- North American Butterfly Association (NABA)
- North American energy independence
- North American Free Trade Agreement (NAFTA)
- North American Native Fishes Association (NANFA)
- North American smallpox epidemic
- North Anatolian Fault Zone (NAFZ)
- North Atlantic current
- North Atlantic Marine Mammal Commission (NAMMCO)
- North Atlantic Salmon Conservation Organization (NASCO)
- North Carolina Agricultural and Technical State University (NC A&T)
- North China Electric Power University
- North China Institute of Science and Technology
- North China Institute of Water Conservancy and Hydroelectric Power
- North China University of Science and Technology
- North Island Volcanic Plateau
- North Pole
- North Sea Canal (Noordzeekanaal)
- North Sea Flood of 1953
- North Sea oil
- North Western Ghats moist deciduous forests
- North Western Ghats montane rain forests
- Northeast Blackout of 1965
- Northeastern coastal forests
- Northern Lights
- Northern Outfall Sewer (in London, England)
- Northern Plains
- Northwest Atlantic Fisheries Organization (NAFO)
- Norwalk virus group
- Norwegian farm culture (bondekultur)
- Norwegian heavy water sabotage
- Norwegian Polar Institute
- (Norwegian rat) Brown Rat (Rattus norvegicus) (Norway rat) (wharf rat) (common rat)
- Norwegian Rocket Incident
- nosology
- Not in Our Genes: Biology, Ideology and Human Nature (book)
- notable birding-related books of the 20th Century
- (Novosibirsk Islands arctic desert: see) New Siberian Islands
- nuclear
- (nuclear accident: see) list of nuclear accidents
- (nuclear accident terminology: see) United States military nuclear incident terminology
- nuclear aircraft
- nuclear arms race
- nuclear artillery
- (nuclear battery: see) atomic battery
- (Nuclear, Biological, Chemical) NBC (weapon)
- nuclear blackmail
- (nuclear breeder reactor: see) fast breeder (fast breeder reactor [FBR])
- (nuclear brinksmanship: see) brinkmanship
- (nuclear bunker: see) bunker
- nuclear bunker buster
- (nuclear car: see) Ford Nucleon
- nuclear chain reaction
- nuclear chemistry
- (nuclear clock: see) atomic clock
- nuclear control rod
- (nuclear decay: see) radioactive decay
- Nuclear Decommissioning Authority (NDA)
- (nuclear deterrence: see) mutual assured destruction (MAD)
- Nuclear disarmament
- (nuclear doomsday clock) Doomsday Clock
- nuclear electric rocket
- nuclear energy
- Nuclear Energy Agency (international)
- Nuclear Energy Board (NEB) (An Bord Fuinnimh Núicléigh) (in Ireland)
- nuclear energy policy
- nuclear engineering
- nuclear explosion (nuclear detonation)
- (Nuclear Exporters Committee) Zangger Committee
- nuclear fallout
- nuclear fission
- Nuclear Football
- Nuclear Free World Policy
- nuclear free zone
- nuclear freeze
- nuclear fuel
- nuclear fuel cycle
- nuclear fusion
- nuclear hazard
- (Nuclear Installations Inspectorate: see) Health and Safety Executive (HSE) (in the UK)
- nuclear lightbulb
- nuclear magnetic resonance (NMR)
- nuclear marine propulsion
- nuclear material
- nuclear medicine
- nuclear meltdown
- nuclear missile
- nuclear missile defense
- nuclear navy
- Nuclear Non-Proliferation Treaty (NPT)
- nuclear photonic rocket
- nuclear physics
- (nuclear pollution: see) radioactive waste
- nuclear power
- Nuclear Power 2010 Program (in the US)
- Nuclear Power Corporation of India Limited (NPCI)
- nuclear power phase-out
- nuclear power plant (NPP)
- nuclear power plant Biblis (in Germany)
- nuclear powered icebreaker
- nuclear proliferation
- nuclear pulse propulsion (External Pulsed Plasma Propulsion)
- (nuclear radiation: see) radioactive decay
- nuclear reaction
- nuclear reactor
- Nuclear Reactor Operator Badge (in the US)
- Nuclear Regulatory Commission (NRC) (in the US)
- nuclear reprocessing
- Nuclear Research and Consultancy Group (NRG) (in the Netherlands)
- Nuclear Risk Reduction Center (in the US)
- nuclear salt-water rocket
- nuclear sharing
- Nuclear Spectroscopic Telescope Array (NuSTAR)
- nuclear strategy
- (nuclear submarine: see) submarine
- nuclear summer
- Nuclear Suppliers Group (NSG) (international)
- nuclear technology
- nuclear terrorism
- (Nuclear Test Ban: see) Comprehensive Test Ban Treaty (CTBT)
- (Nuclear Test Ban Treaty [NTBT]: see) Partial Test Ban Treaty
- nuclear testing
- nuclear thermal rocket
- (Nuclear Threat Initiative: see) The Nuclear Threat Initiative (NTI)
- nuclear transfer (in cloning)
- (nuclear transmutation: see) transmutation
- nuclear utilization target selection (NUTS)
- nuclear warfare
- (nuclear warning: see) four minute warning
- (nuclear waste: see) radioactive waste
- (Nuclear Waste Project Office: see) Agency for Nuclear Projects
- nuclear weapon
- nuclear weapon design
- nuclear weapons and the United Kingdom
- nuclear weapons and the United States
- (nuclear weapons proliferation: see) list of countries with nuclear weapons
- nuclear winter
- (Nuclear-Powered Ships Recycling Program: see) Ship-Submarine recycling program (SRP)
- numerical weather prediction
- nurse shark
- nursery (horticulture)
- nutrigenomics
- nutritional yeast
- (Nux vomica) strychnine tree (source of strychnine)
- nylon
- nylon fiber
- nymph (biology)
- (nymph [fishing]: see) fly lure
O
- Oahe Dam ("a major man-made dam")
- oak
- oasis
- Oasis crater
- (Oasis of Siwa) Siwa Oasis
- oast house
- oat
- (obesity virus: see) AD-36
- (obsequent stream: see) fluvial landforms of streams
- observational astronomy (see "light pollution" in places)
- (Observatoire de Paris) Paris Observatory
- observatory (see also list of observatories)
- obsidian hydration dating
- obsolescence (affecting waste)
- Obsolescence Management
- obstetric ultrasonography
- (obtrusive lightning: see) light pollution
- occultation
- occupational disease
- occupational hygiene
- occupational safety and health
- Occupational Safety and Health Act
- Occupational Safety and Health Administration (OSHA) (in the United States)
- ocean
- (ocean basin) oceanic basin
- (ocean circulation: see) ocean current
- (Ocean Climate Laboratory) National Oceanographic Data Center (NODC) (in the United States)
- ocean colonization
- (ocean conveyor belt: see) thermohaline circulation
- ocean current
- Ocean Drilling Program (ODP)
- Ocean Dumping Act
- Ocean Dumping Ban Act
- ocean energy
- ocean exploration
- (ocean floor) seabed (sea floor) (seafloor) (ocean floor)
- ocean floor disposal
- ocean liner
- ocean surface wave
- ocean thermal energy conversion (OTEC)
- (ocean trench) oceanic trench (see under Water and Biosphere)
- ocean turbidity
- (ocean wave: see) ocean surface wave
- (Ocean-to-Ocean Highway) National Old Trails Highway
- Oceania ecozone
- (oceanic anoxic event) anoxic event
- oceanic basin
- oceanic climate
- (oceanic current) ocean current
- oceanic dolphin
- (oceanic rift: see) divergent boundary
- oceanic trench
- Oceanographic Museum (in Monaco)
- oceanography
- octane
- octane rating
- Odic force
- off-label use (of prescribed drugs)
- (off-label use of dextromethorphan: see) non-medical use of dextromethorphan
- (off-piste skiing: see) backcountry skiing
- off-road
- (off-road bicycling: see) mountain biking
- off-road transport
- off-road vehicle
- (off-roader: see) sport utility vehicle (SUV)
- offal
- Office of Gas and Electricity Markets (Ofgem)
- Office of Laboratory Animal Welfare (in the United States)
- Office of Ocean Exploration (OE)
- Office of Oceanic and Atmospheric Research (OAR)
- Office of Water Services (Ofwat)
- Office of the Gene Technology Regulator (in Australia)
- (office park: see) industrial park
- offroad racing
- offshore construction
- offshore powerboat racing
- (offshore windfarm: see) wind power
- (Ofgem) Office of Gas and Electricity Markets
- (Ofwat) Office of Water Services
- Ogallala Aquifer
- (Ogasawara subtropical moist forests: see) Ogasawara Islands
- Oglala National Grassland
- oil
- (Oil - Environmental Impact: see) petroleum
- Oil and Gas Industry metering and control system
- (Oil and Natural Gas Commission Limited) ONGC (in India)
- oil boom
- (oil companies: see) list of petroleum companies
- oil crash
- (Oil Crises: see) energy crisis
- (Oil Crisis: see) 1973 oil crisis
- (oil deposits: see) oil field
- (oil derrick: see) derrick (lifting device)
- oil desulfurization
- (oil diplomacy: see) petroleum politics
- (oil drill: see) oil well
- (oil drilling: see) oil well
- (oil embargo crisis: see) 1973 oil crisis
- (oil empire: see) oil imperialism theories
- oil exploration
- oil field
- (Oil for Food: see) Oil-for-Food Programme
- oil imperialism theories
- oil industry
- oil lamp
- (oil of turpentine) turpentine (see especially under Hazards)
- (oil of vitriol) sulfuric acid ("the most widely used industrial chemical")
- (oil of wintergreen) methyl salicylate
- (oil paint: see) painting oil
- oil palm
- (Oil Peak: see) Hubbert peak
- (oil pipeline: see) pipeline transport
- oil platform
- Oil Pollution Act of 1990 (in the United States)
- oil price increase of 1990
- oil price increases of 2004 and 2005
- oil refinery (see especially under Safety and environmental concerns)
- oil reserves
- oil reservoir
- (oil rig: see) drilling rig
- (Oil Rivers) Niger Delta
- (Oil Rivers Protectorate) Niger Coast Protectorate
- (oil sand) tar sands (bituminous sand)
- (oil seed: see) vegetable oil (including "industrial uses")
- oil shale
- (Oil Shock: see) 1973 oil crisis
- oil spill (oil slick)
- oil supplies
- (oil tanker: see) tanker
- oil well
- Oil-for-Food Programme
- (oil-seed: see) vegetable oil (see "industrial uses" in article)
- oiler (ship)
- (oilfield) oil field
- oilpatch
- (oilseed rape) rapeseed
- (oilwell) oil well
- (Okanagan Mountain Park Fire) 2003 Okanagan Mountain Park Fire (Canadian spelling: "Okanagan")
- Okanogan National Forest (American spelling: "Okanogan")
- Okapi Wildlife Reserve
- Okefenokee Swamp (peat-filled marsh in the United States)
- Oklahoma Tornado Outbreak (in 1999)
- Oklo (in Gabon) (place noted for natural nuclear reactions)
- Old Faithful Geyser
- old growth forest (late seral forest) (ancient forest)
- Old Tropical Cyclone Names
- (Old World rats and mice: see) Murinae
- oldest known object on Earth
- oleochemical
- (oleoresin: see) resin
- olfaction (the sense of smell)
- oligodynamic effect
- oligotrophic
- omnicide
- omnivore
- oncomouse (a type of genetically modified laboratory mouse)
- one-child policy
- open field system (in agriculture)
- open hearth furnace (Catalan forge) (in metallurgy)
- (open plain: see) grassland
- open pollination
- open-pit mining
- Operation Plumbbob (nuclear test series)
- operative temperature
- Oppenheimer-Phillips process
- optical astronomy
- optically stimulated luminescence (OSL) (for measuring ionizing radiation)
- (optimal carbon tax: see) carbon tax
- optimum population
- orbital airship
- orbital bombardment
- (orbital debris) space debris (space junk)
- orbital decay
- (orbital elevator) space elevator (space bridge) (star ladder)
- orbital engine
- (orbital flight) orbital spaceflight
- orbital forcing (see also Milankovitch cycles)
- (orbital observatory: see) space observatory
- (orbital power satellite: see) solar power satellite (SPS)
- orbital spaceflight
- Orbiting Astronomical Observatory (OAO)
- orca (killer whale) (grampus) (see under Orcas and modern man)
- orchard
- ore
- ore grade
- organic
- (organic agriculture) organic farming
- (organic ambient music: included in) ambient music (see under Organic ambient music)
- organic certification
- organic chemistry
- organic compound
- organic electronics (plastic electronics)
- organic farming
- (organic fertilizer: included in) fertilizer (see under Organic fertilizers)
- organic food
- (organic garden: see) list of organic gardening and farming topics
- organic gardening
- organic geochemistry
- organic horticulture
- organic lawn management
- organic light-emitting diode (OLED)
- organic liquid
- organic movement
- organic peroxide (see under "Safety")
- (organic produce: see) organic food
- organic production
- (organic radical: see) alkane (see especially under Combustion)
- organic reaction
- organic reduction (organic oxidation) (organic redox reaction)
- organic salt
- organic semiconductor
- (organic solvent: see) solvent
- organic synthesis
- organicism
- Organization for Mine Clearance and Afghan Rehabilitation (OMAR)
- Organization for the Prohibition of Chemical Weapons (OPCW)
- Organization of Arab Petroleum Exporting Countries (OAPEC)
- (Organization of the Petroleum Exporting Countries) OPEC
- organochlorine compound ("many are toxic")
- organometallic chemistry
- organophosphate (OP) ("most are potent neurotoxins")
- organosulfur compounds ("pollutants")
- organotin (stannanes) (see "toxicity" in text of article)
- orographic lift
- (orographic precipitation: see) precipitation (meteorology)
- orography
- orthovoltage X-rays
- (osmobiosis: included in) cryptobiosis
- osmosis (see under Reverse osmosis)
- (osteofluorosis) skeletal fluorosis
- (other countries affected by the 2004 Indian Ocean earthquake: see) countries affected by the 2004 Indian Ocean earthquake
- Ottawa Treaty (Mine Ban Treaty)
- Otto fuel II (OTTO fuel II) (a toxic substance)
- (Otto-cycle engines: see) Four-stroke cycle
- Our Common Future (report from the UN)
- Our Posthuman Future: Consequences of the Biotechnology Revolution
- Out of Control: The New Biology of Machines, Social Systems, and the Economic World
- outback
- outboard motors
- (Outdoor Air Pollution:) air pollution
- outer space
- Outer Space Treaty
- outer trench swell (see "earthquakes" in text of article)
- over-consumption
- (over-hunting: see) hunting
- (over-lighting: see) light pollution
- overdriven fluorescent light
- overfishing
- overgrazing
- overhead cable
- overhead line crossing
- (overhead pylon) electricity pylon
- overhead lines (overhead wires)
- overhead powerline
- (overheating) hyperthermia (heat stroke) (sunstroke)
- overland flow
- overpopulation
- overpopulation (animals)
- Oxfam
- (oxidant: see) redox
- (oxidation: see) redox
- (oxidation-reduction reaction: see) redox
- oxide
- oxy-fuel welding and cutting
- oxyacetylene
- oxygen (see under Applications and under Precautions)
- oxygen burning process
- oxygen cycle
- oxygen depletion
- oxygen first aid
- oxygen minimum zone
- oxygen saturation
- oxygen sensor
- oxygen toxicity (oxygen toxicity syndrome) (oxygen poisoning)
- ozone
- ozone-oxygen cycle
- ozone depletion
- ozone depletion potential (ODP)
- ozone layer (ozonosphere)
P
- Pachmarhi Biosphere Reserve
- Pacific-Antarctic Ridge
- Pacific (ocean)
- Pacific Coast Ranges
- Pacific decadal oscillation
- Pacific Fishery Management Council (PFMC)
- Pacific Gas and Electric Company (PG&E)
- Pacific Marine Environmental Laboratory (PMEL)
- (Pacific Mountain System: see) Geography of the United States Pacific Mountain System
- Pacific Northwest National Laboratory (PNNL)
- Pacific Northwest Seismograph Network (PNSN)
- Pacific Remote Islands National Wildlife Refuge Complex
- Pacific Ring of Fire
- Pacific temperate rain forests
- Pacific Tsunami Warning Center
- (pack ice: see) sea ice
- pack rat (trade rat) (wood rat)
- packaging and labelling
- packhorse bridge
- paddle steamer (paddleboat) (paddlewheeler)
- (paddlewheel steamboat: see) riverboat
- paddy field
- Padre Island National Seashore
- paint
- paint stripper
- (paint thinner: see) turpentine substitute
- (painting basic topics) list of painting topics
- painting oil
- Pakistan's Satellite Launch Vehicle
- Paks Nuclear Power Plant (in Hungary)
- paleobotany
- paleoclimatology
- paleoecology
- (paleogeography) palaeogeography
- paleogeology
- paleolimnology
- paleomagnetism
- paleontology
- paleosol
- paleotempestology
- (paleowater) fossil water
- paleozoology
- Palestinian Environmental NGOs Network
- Palm Sunday Tornado Outbreak
- Palm Sunday Tornado Outbreak II
- Palo Verde Nuclear Generating Station
- Palomar Observatory
- palynology
- palytoxin
- Panama disease (a banana plant disease)
- panbiogeography
- pandemic (see also list of epidemics)
- Pangaea
- Pangaea Ultima
- paper
- paper chromatography
- paper engineering
- (paper mail) snail mail
- paper mill
- Paper Mulberry
- (paper pulp: see) pulpwood
- (paper recycling: see) recycling
- paper shredder
- paper towel
- paper wasp
- paperboard
- paperless office
- Papua New Guinea stilt house
- papyrus
- Para rubber tree (Pará rubber tree)
- parable of the broken window (an economics topic with environmental relevance)
- paradise
- Paradise River Hydroelectric Generating Station
- paradise garden
- paraffin
- (paraffin lamp) kerosene lamp
- (paraffin oil) kerosene
- (parahydrogen: see) orthohydrogen
- (parallel drainage system: see) drainage system
- parasite
- parasitic worm
- parasitoid
- parasitology
- (parasol: see) umbrella
- (parazoa: see) sponge
- parchment
- parclo interchange (partial cloverleaf interchange)
- park and ride
- parking
- (parking garage: see) multi-storey car park
- parking lot
- parking space
- Parks Canada
- parkway
- (Parsons turbine: see) steam turbine
- (partial lunar eclipse: see) lunar eclipse
- partial zero-emissions vehicle (PZEV)
- (partially hydrogenated soybean oil: see) trans fat
- (partially hydrogenated vegetable oil: see) trans fat
- particle (ecology)
- particle board
- particle detector
- particle physics
- particle radiation
- parts per million
- particulates (particulate matter) (PM)
- passenger car (passenger carriage) (of a train)
- (passenger conveyor: see) escalator
- (passenger jet: see) jet airliner
- passenger pigeon (extinct bird)
- passenger ship (passenger liner)
- (passenger train: see) train
- passenger train human waste disposal
- passerine (bird of the order Passeriformes)
- Passive infrared sensors (PIRs)
- passive component (see same for "passive filter")
- passive radar
- passive radiator
- passive safety feature
- (passive smoking: see) tobacco smoking
- passive solar (heating)
- (passive sonar: see) sonar
- passively safe
- pasteurization
- pavement (disambiguation)
- (pea and bean weevil: see) bean weevil (seed beetle)
- peace park
- peaceful coexistence
- peak ground acceleration (for measuring earthquakes)
- (peak hour) rush hour
- (peak land value intersection) PLVI
- (peak oil: see) Hubbert peak
- (Peak XV) Mount Everest
- peasant foods
- peat
- (peat bog: see) bog
- pebble bed reactor
- (pedal bicycle) bicycle (pedal cycle)
- pedestrian
- pedestrian-friendly
- pedestrian crossing (crosswalk)
- (pedestrian overpass: see) overpass
- (pedestrian scramble) Barnes Dance
- pedestrian street (pedestrian mall)
- (pedestrian underpass: see) tunnel
- (pedestrian zone) auto-free zone (car-free zone) (pedestrianized zone)
- (pedicab) cycle rickshaw (velotaxi) (trishaw)
- pedology (soil study)
- pelagic zone
- Pelee, Ontario
- pelican crossing (from pelicon crossing: pedestrian light-controlled crossing, a synonymous term)
- Pelican Island National Wildlife Refuge
- Pemex (Petróleos Mexicanos) (Mexico's state-owned, nationalized petroleum company)
- pencil lead (not lead)
- peninsula
- penstock
- (penumbral eclipse: see) lunar eclipse
- (peoplecarrier: see) minivan
- people mover
- (people food: see) food
- People for the Ethical Treatment of Animals
- pepper spray
- Percy Schmeiser (farmer)
- periodic table (periodic table of the chemical elements) (Mendeleev periodic table)
- permaculture
- permanent crop
- permanent water rights (Alberta)
- permeability (geology)
- permeable paving
- (permissive waste: see) waste (law)
- perpetual motion
- Perseids (Perseid meteor shower)
- (Persian wheel) water wheel (waterwheel) (Norse mill) (noria)
- Persistent Organic Pollutant (POP)
- personal rapid transit (PRT)
- personal water craft
- perverse effects of vaccination
- pesco/pollo vegetarianism (pescetarianism) (semi-vegetarianism)
- pest (animal)
- pest control
- pest control of slugs
- pest zapper
- pesticide
- pesticide misuse
- pesticide poisoning
- pesticide side effects
- pesticide toxicity to bees
- pestilence
- pet
- (pet burial: see) burial
- (pet cat: see) cat (see under Environmental effects)
- (pet cemetery: see) cemetery (see under Cemeteries for pets)
- pet cloning (see under "Controversy")
- (pet fish: see) aquarium (see especially under Ecology) (see also list of aquaria)
- (pet raccoon: see) raccoon (see under "Raccoons as pets")
- pet skunk (see under Rabies)
- pet store (pet shop)
- Petri dish
- petrifaction (petrification)
- Petrified Forest National Park
- petrified wood
- petrifying well
- Petro-Canada
- Petrobras 36 Oil Platform
- petrochemical
- petrochemicals
- petrochemistry
- PetroChina (PetroChina Company Limited)
- petrocide
- petrocurrency
- (petrodiesel: see) diesel
- petrodollar
- petrodollar recycling
- petroform
- petroglyph (an image recorded on stone)
- Petroglyphs Provincial Park
- petrography
- (petrol) gasoline (motor spirit)
- (petrol barrel: see) barrel (unit)
- (petrol bomb) Molotov cocktail
- (petrol engine) gasoline engine
- (petrol oil) petroleum (crude oil)
- (petrol pump: see) filling station (gas station) (petrol station)
- (petrol station) filling station
- (petrol tax) fuel tax (gasoline tax) (gas tax) (fuel duty)
- (petrolatum) petroleum jelly (brand name "Vaseline")
- petroleum (crude oil)
- petroleum coke
- (petroleum crisis: see) energy crisis
- (petroleum disaster) oil spill
- petroleum engineering
- (petroleum ether) benzine
- petroleum geochemistry
- petroleum geology
- (petroleum industry: see) history of the petroleum industry in North America
- petroleum jelly (petrolatum) (brand name "Vaseline")
- petroleum maturation
- petroleum politics
- petroleum product
- (petroleum refinery) oil refinery
- petroleum revenue tax (PRT) (in the United Kingdom)
- (petroleum war: see) oil imperialism theories
- petrolhead (a type of person)
- Petrolia, Ontario ("Canada's Victorian Oil Town")
- (Petrolite) Baker Petrolite (company)
- petrology
- Petronas (Petroliam Nasional Berhad) (Malaysia's state-owned oil and gas company)
- Petronius Platform (oil rig)
- (Petróleos Mexicanos) Pemex (Mexico's state-owned, nationalized petroleum company)
- Petróleos de Venezuela (Petróleos de Venezuela, S.A.) (PDVSA) (Venezuelan state-owned petroleum company)
- (pets and work animals as a food source: see) taboo food and drink
- Petten nuclear reactor (in Petten, the Netherlands)
- petting zoo
- (pharmaceutical chemistry) medicinal chemistry
- pharmaceutical company
- (pharmaceutical industry: see) list of pharmaceutical companies
- (pharmaceutical product: see) drug
- pharmaceutics
- pharmacodynamics
- pharmacogenetics
- pharmacogenomics
- pharmacokinetics
- pharmacology
- pharmacopoeia (pharmacopeia)
- pharmacophore
- pharmacovigilance
- pharmacy
- pharming (genetics)
- phase change heat pump
- (phases of water cycle: see) water cycle
- Philippine Eagle ("slowly dwindling in numbers")
- photobiology
- photochemical reaction
- photochemistry
- photohydrogen
- (photopollution) light pollution (luminous pollution)
- photosynthesis
- photosynthetic pigment
- photosynthetically active radiation (PAR)
- photosystem (photosynthetic reaction center)
- (phototherapy) light therapy
- phototoxic
- photovore
- physical chemistry
- physical geography
- physical oceanography
- physical science
- physics
- (Physiographic Regions of the United States: see) United States physiographic region
- (physiological dead space: see) dead space
- physiological plant disorders
- physiology
- phytochemical (phytonutrient)
- phytochemistry
- phytochrome
- phytoestrogen
- phytohaemagglutinin (PHA) (phytohemagglutinin)
- (phytohormone) plant hormone (plant growth regulator) (PGR)
- (phytology) botany (plant science[s]) (plant biology)
- phytonomy
- (phytonutrient) phytochemical
- phytopathology
- (phytophagia: see) phagy
- (phytophagy: see) phagy
- phytoremediation (treatment of environmental problems by means of plants)
- (phytotherapy) herbalism
- phytotreatment
- picotechnology
- piezoelectric microbalances
- piezoelectric motor
- piezoelectricity
- pigment
- pile
- pile dwellings
- piledriver
- pile-up (traffic accident involving many vehicles)
- Pilot project on Delivery of water to households far from sources of safe water
- pinworm (a parasitic roundworm)
- pioneer plant
- pioneer species
- Pipeline Inspection Gauge (PIG)
- pipeline transport
- piston
- (piston engine) reciprocating engine
- placer deposit
- placer mining
- plague
- plague pit
- plain
- (planet Earth) Earth
- planetarium
- (Planétarium de Montréal) Montreal Planetarium
- planetary boundary layer (PBL)
- planetary ecosynthesis
- planetary engineering
- planetary protection
- planetary science (planetology) (planetary astronomy)
- planktology
- plankton
- (planned city: see) new town (planned community)
- planned obsolescence
- planned ruins
- plant
- plant-based diet
- plant-made pharmaceuticals (PMPs) (biopharming)
- (plant biology) botany
- (plant biotechnology: see) plant breeding
- plant breeders' rights (plant variety rights) (PVR)
- plant breeding
- (plant community: see) biocoenosis (biocoenose) (biocenose) (biotic community) (ecological community)
- (plant disease: see) phytopathology (plant pathology)
- plant embryogenesis
- (plant fiber: see) fiber crop
- (plant growth substance) plant hormone (plant growth regulator) (PGR)
- (plant hardiness zone: see) USDA plant hardiness zone
- plant hormone (plant growth regulator) (PGR)
- (plant improvement: see) plant breeding
- (plant invasion: see) invasive species
- (plant nursery: see) nursery (horticulture)
- plant nutrition
- (plant pathology) phytopathology
- plant physiology
- plant propagation
- (plant science) botany
- plant senescence
- plant sexuality
- (plant succession: see) ecological succession
- plant tissue culture
- (plant variety rights) (PVR) plant breeders' rights
- plant virus
- plantation
- plantation economy
- plantation era
- (planting) sowing
- plastic
- (plastic bag: see) plastic shopping bag
- plastic bullet (plastic baton round)
- (plastic electronics) organic electronics
- plastic explosive (plastique)
- plastic goods
- plastic limit (soils) (for water content)
- plastic mulch
- plastic recycling
- (Plastic Recycling Code: see) resin identification code
- plastic shopping bag
- plastic wrap (cling-film)
- plastics engineering
- plate tectonics
- plateau
- plough (plow)
- plowshare (ploughshare) (plough share)
- plug (horticulture)
- plumbing
- plumbing drainage venting
- plumbing fixture
- plutonium
- (plutonium economy) fast breeder (fast breeder reactor) (FBR)
- pluvial lake
- (pneumatic drill) jackhammer (pneumatic hammer)
- pneumatic filter
- (pneumatic tire) tire (tyre) (pneumatic tyre)
- pneumatic tool
- pneumatic tube (pneumatic mail) (pneumatic post)
- pneumatics
- pneumoconiosis
- pneumonoultramicroscopicsilicovolcanoconiosis
- poaching
- point of no return (a topic in social psychology, with environmental relevance)
- poison
- poison dart frog (poison arrow frog)
- poison control center (PCC)
- (poison gas: see) chemical warfare
- (poison hemlock: see) Conium
- (poison oak: see) Toxicodendron
- Poison Sumac (Toxicodendron vernix or Rhus vernix)
- poison-ivy
- (poisoning, carbon monoxide: see) carbon monoxide poisoning
- (poisonous fungus: see) mushroom poisoning
- (poisonous mushroom: see) mushroom poisoning
- poisonous snake
- (polar aurora) aurora (astronomy)
- (polar cap) polar ice cap
- polar circle
- polar climate
- (polar day: see) midnight sun
- polar easterlies
- polar high
- polar ice cap
- (polar light: see) aurora (astronomy)
- polar low
- (polar mesospheric cloud) noctilucent cloud
- Polar Mesospheric Summer Echos (PMSE)
- polar night
- polar region
- (polar reversal) magnetic polarity reversal
- polar stratospheric cloud (PSC) (nacreous cloud)
- polarization
- pole of inaccessibility
- pole shift theory
- polio vaccine
- poliomyelitis (infantile paralysis) (see same for "poliovirus" [PV])
- (political ecologist: see) Green movement
- political ecology
- pollen
- pollen basket (of honeybee)
- pollen core
- pollen count (concentration in air)
- pollen source
- pollen tube (of plant)
- pollen zone
- pollenizer (polleniser) (plant that provides pollen)
- pollination
- pollination management
- pollinator (agent that moves pollen)
- pollinator decline
- pollutant
- Polluter Pays
- polluter pays principle
- (polluting emission: see) emission
- pollution
- (pollution credit: see) emissions trading
- (pollution pump: see) exhaust gas recirculation (EGR)
- polychlorinated biphenyl (PCB)
- polyculture
- polycyclic aromatic hydrocarbon (PAH)
- polyester
- (polyester recycling: see) Recycling of PET Bottles
- polymer
- polymer chemistry (macromolecular chemistry)
- polymer clay
- polymer degradation
- polymer physics
- polymer solar cells
- polymerase
- polymerase chain reaction (PCR)
- polymeric membranes
- polymerization
- polymorphism (biology)
- (polyphagy: see) phagy
- (polytetrafluoroethylene) (PTFE) teflon (see especially under "Toxicity")
- polyvinyl chloride (PVC)
- polywater
- (pop can) aluminum can (aluminium can)
- population (see also list of countries by population)
- population biology
- population bottleneck (genetic bottleneck)
- (population cartogram: see) cartogram
- (population census: see) census
- population control
- (population count: see) census
- population decline
- population density
- population dynamics
- population ecology
- (population exchange: see) population transfer
- (population explosion: see) overpopulation
- population genetics
- population geography
- population growth
- population growth rate
- population history of American indigenous peoples (see under Depopulation from disease)
- population of Atlanta
- population of Brazil
- population of British Columbia in 1800's
- population of England
- (population of Finland: see) demographics of Finland
- population of India
- population of Metropolitan Chicago
- (population of Paris: see) demographics of Paris
- population of Texas cities in 2000
- population of the Byzantine Empire
- (population of the United States: see) demographics of the United States
- population process (including environmental and ecological applications)
- population size
- population statistics
- (population time bomb: see) overpopulation
- population transfer
- population transfer in the Soviet Union
- population viability analysis (PVA)
- pork tapeworm (infecting pigs and humans)
- Portland cement
- (positive lightning: see) lighting
- positive pressure
- positive pressure ventilation
- positive streamer
- positron emission tomography (PET)
- post-consumer waste
- post-exposure prophylaxis (PEP)
- post-glacial rebound
- post-harvest handling
- post-industrial economy
- post-industrial society
- post scarcity
- (potability: see) water
- potability of backcountry water
- (potable: see) drinking water
- (potable water: see) drinking water
- potash
- potassium hydroxide (caustic potash) (potassa) (potash lye) (potassium hydrate)
- potato ("the world's most important non-cereal crop")
- (potato blight: see) Phytophthora infestans
- (potato bug) Jerusalem cricket (Stenopalmatus) (niño de la tierra) (old bald-headed man)
- potato famine
- (potato fungus) Phytophthora infestans
- potato spindle tuber viroid (PSTV) (see PSTV)
- (potential chemical warfare agent: see) chemical warfare
- potential energy
- potential evaporation
- potential evapotranspiration (PET)
- (potential hill: see) potential well
- potential temperature
- potentially hazardous asteroid (PHA)
- pottery
- potty
- pouched rat (see "monkeypox")
- poultry
- poultry disease
- powdery mildew
- power (physics)
- power strip (power bar) (gangplug) (multibox)
- (power conservation) energy conservation
- power consumption
- power control (electric power control)
- power conversion
- (power cut) power outage
- power delivery
- (power density) specific power (power per unit mass)
- (power distribution: see) electricity distribution
- power engineering
- (power excursion) criticality accident
- (power failure) power outage
- (power generation) electricity generation
- (power grid: see) electric power transmission
- (power inverter: see) inverter (electrical)
- power level
- (power line: see) electric power transmission
- power management
- (power meter: see) electricity meter
- power outage (power cut) (power failure)
- power station (power plant)
- power supply in Norway
- (power surge) voltage spike (power spike)
- power transfer
- power transmission
- (power unit: see) electrical generator
- power word (see under Environmental Issues)
- prairie
- (pre-consumer waste: see) recycling
- precautionary principle
- precipitation (meteorology)
- precision agriculture (precision farming)
- precision seeding
- predation
- pregnant leach solution (PLS)
- prehistoric life
- preservation
- preservationist
- preservative
- (preserved food) food preservation
- (President's Council on Bioethics) The President's Council on Bioethics
- (pressure-treated lumber: see) lumber (see under "Preservatives")
- (pressure-treated wood: see) lumber (see under "Preservatives")
- (pressure barrier osmosis: see) osmosis
- (pressure lamp: see) kerosene lamp
- (pressure sickness: see) diving hazards and precautions
- (pressure tank: see) reservoir
- pressure vessel
- pressurized water reactor (PWR)
- preventive maintenance (PM) (a means of waste management)
- (preventive measure: see) risk
- preventive medicine
- (preventive paradigm: see) precautionary principle
- Price-Anderson Nuclear Industries Indemnity Act
- (price of Earth) value of Earth
- primary energy
- primary nutritional groups
- primary producer
- primary production (production of biological organic compounds)
- primary sector of industry (see same for "primary products")
- primate
- (primate extinction: see) ape extinction
- primatology
- primer (paint)
- prior appropriation water rights
- probiotic
- processed cheese
- (processed food: see) food preservation
- (processed meat: see) meat
- (Processing of Cotton: see) cotton
- processing of coffee
- Procession of the Species (an annual Earth Day celebration)
- (producer gas) wood gas (syngas)
- producer species
- productivism
- products based on refined oil
- Professional Lighting Design (magazine)
- prohibitory traffic sign
- projectile
- (projection [cartography]: see) map projection
- prokaryote (see under Environment)
- propane
- (propane refrigeration: see) absorptive refrigeration
- propellant
- propeller
- (propeller wind generator: see) wind turbine
- Property and Environment Research Center (PERC)
- proposed future transport
- propulsion method
- prospecting
- prospector
- protected area
- protected areas
- protected areas of California
- protected areas of Finland
- protected areas of Michigan
- protein biosynthesis
- protein engineering
- protein synthesis
- protein toxicity
- Protocol on Environmental Protection to the Antarctic Treaty
- proton-exchange fuel cell (Polymer Electrolyte [Membrane] Fuel Cell) ("PEM" or "PEMFC")
- proton-proton chain reaction
- protozoa
- protozoology
- psychedelic mushroom
- psychedelics, dissociatives and deliriants (see under Hallucinogenic plants, fungi, and animals)
- public awareness of science
- public health
- Public Health Cigarette Smoking Act
- public health law
- Public Interest Research Groups (PIRGs)
- Public Land Survey System
- (public lavatory: see) toilet
- public light bus
- (public park: see) park
- (public restroom: see) toilet
- Public Safety
- Public Safety and Emergency Preparedness Canada
- public transit
- public transport (public transit)
- public utility
- public works
- Puerto Rican dry forests
- Puerto Rico Trench
- puffin crossing (pedestrian user-friendly interface)
- Puget Sound environmental issues
- (pulp: see) wood pulp
- pulp and paper industry
- (pulp mill: see) wood pulp
- pulper (in agriculture; in the wood-processing industry; in recycling)
- pulping
- pulpwood
- pulse (legume)
- pulse jet engine
- pulsed power
- pumice
- pump boat
- (pump jack) nodding donkey
- pumped-storage hydroelectricity
- (pumper truck: see) fire engine
- pumping for use in water purification systems
- Pumping Station
- pumping station
- (pumping test: see) aquifer test
- puppy mill
- Pure Food and Drug Act
- purification
- purified water
- purity
- putrefaction
- pyrocumulus
- pyroelectricity
- pyrometallurgy
- pyrotechnics
Q
- quality of life (measuring well-being)
- quarantine
- quarry
R
- rabbits in Australia
- rabies
- race (biology)
- race in biomedicine (see "environmental responses")
- Rachel Carson (zoologist, biologist, environmentalist)
- (radial drainage system: see) drainage system
- (radial railway) interurban streetcar
- radiation (see also list of radiation topics)
- radiation of sound
- radical environmentalism
- radical values environmentalism
- radicle
- rag and bone man (junk dealer)
- Raid (insecticide)
- rail
- rail transport (see also list of rail transport topics)
- rain
- (rain barrel) cistern
- rain fade (fading of signal by rain or snow)
- rain follows the plow
- (rain forest) rainforest
- rain gauge
- (rain of fish: see) raining animals
- (rain season: see) monsoon
- rain sensor
- rain shadow
- rainbow
- (rainfall: see) precipitation (meteorology)
- rainforest
- Rainforest Action Network
- rainforest destruction
- (rainguage: see) weather
- raining animals
- rainout (nuclear fallout by rain)
- rainshadow
- (rainshadow effect: see) rain shadow
- (rainy season) wet season
- raised beach
- raised bed gardening
- rake (tool)
- rakehoe (firefighting tool)
- (Rakiura Island temperate forests: see) Stewart Island/Rakiura
- Rakiura National Park
- Ralph Nader (environmentalist)
- ram pressure
- (ram pump) hydraulic ram
- ram scoop
- Rambler Channel Typhoon Shelter
- rammed-earth construction
- rammed earth
- ramp meter (metering light)
- Ramsar Convention
- Ramsar list of wetlands of international importance
- Ramstein airshow disaster (in Germany)
- ranch
- ranch (land)
- ranching
- (ranch road: see) Farm to Market Road (F-t-M routes)
- Rand McNally (publisher of maps, globes, and atlases)
- Rangantittu Bird Sanctuary
- ranger
- rapeseed (canola)
- (see under Cultivation and uses and under Rapeseed and health and under Controversy and under Pests and diseases affecting canola)
- rapid transit
- rare disease
- rare earth
- rare earth element
- (rare gas) noble gas
- Rare-earth magnet
- rarefaction
- rat
- rat genome database (RGD)
- rat poison
- rat snake
- rat-catcher
- rate of fluid flow
- rate of heat flow
- rattlesnake
- raw feeding
- raw food diet
- raw water
- ray
- ray (fish)
- reactor
- (Reactor Safety Study) WASH-1400
- RealClimate (commentary site on climate science)
- RealSky (digital photographic sky atlas)
- (Recent Submarine Accidents) major submarine incidents since 2000
- rechargeable battery
- (reclaimed land: see) land reclamation
- reclaimed water (recycled water)
- recombinant DNA technology
- Reconciliation Ecology
- (reconstruction of temperature record for past 1000 years) temperature record of the past 1000 years
- (recreational fishing: see) fishing
- rectenna (device for energy conversion)
- recumbent bicycle
- (recycle bin: see) dustbin
- (recycled water) reclaimed water
- recycling
- recycling of PET Bottles
- Recycling Symbol
- red alga (important for building reefs)
- (red biotechnology: see) biotechnology
- (red diesel: see) diesel (see under Uses)
- red imported fire ant
- (red laser: see) laser (see under Physics and history and under Popular misconceptions)
- red lead
- (Red List) IUCN Red List (see same for "Red List of Endangered Species" and for "Red List of Threatened Species")
- Red River
- Red River Flood, 1997
- Red River Floodway
- Red Rock Canyon
- (red sky: see) weather lore
- Red Spider Mite
- (red tide: see) algal bloom
- reducing environment
- Reedy Creek Improvement District
- reef safe
- (reentry: see) atmospheric reentry
- reentry capsule
- re-entry vehicle
- reference beam
- reference dose
- refined resource
- refinery
- refining
- reflection seismology
- (reflective barrier) radiant barrier
- reforestation
- refrigerant
- refrigerator car (refrigerated boxcar)
- refrigeration
- refrigeration cycle
- refrigerator
- refugee camp
- refurbishment
- (refuse) waste
- (refuse disposal) waste management
- regeneration
- Regina Cyclone
- regional park
- Register of Parks and Gardens
- Registration, Evaluation and Authorization of Chemicals
- (Registry of Toxic Effects of Chemical Substances) RTECS
- regulation of science
- (regulatory biology: see) homeostasis
- (reindeer lichen) (reindeer moss) Cladonia rangiferina
- (relative dB: see) decibel
- relative humidity
- relative pressure
- relative thermal resistance
- Reliant Energy (a Texas energy company)
- Relief International
- (relief precipitation: see) orographic lift
- remanufacturing
- remediation
- remote control vehicle
- remotely piloted vehicle (RPV)
- render safe procedure
- (rendering plant: see) industrial rendering
- Renewable and Appropriate Energy Laboratory
- renewable energy (sources) (RES)
- renewable energy development
- renewable resource
- renovation
- repair and maintenance (a means of waste management)
- replication
- (Report From Iron Mountain) The Report From Iron Mountain
- reproduction
- reproductive technology
- reprogenetics
- research
- research and development
- research balloon
- Research Institute of Crop Production
- Research Natural Area
- research station
- research vessel
- (resequent stream: see) fluvial landforms of streams
- reservation
- reservoir
- (reservoir lake: see) lake
- (residence: see) house
- (resident animal: see) migration
- residential garden
- residual fuel
- Resistance Temperature Detector
- resistance thermometer
- resistojet rocket
- resort
- resource
- Resource Conservation and Recovery Act
- resource curse
- resource depletion
- resource economics
- resource extraction
- Resource Management Act (RMA) (in New Zealand)
- resource rent
- resources camp
- respect diversity
- respect for diversity
- restoration ecology
- restricted use pesticides
- Restriction of Hazardous Substances Directive (RoHS) (in Europe)
- (restroom: see) washroom architecture
- resurgent dome
- resurrection ecology
- Reticulated Python
- reverberation
- reverberation room
- reverberatory furnace
- reversible fuel cell (RFC)
- Reversing Falls
- RFID (Radio Frequency Identification)
- rheology
- Rhine
- rhinoceros
- Rhône River
- ("Rhus toxicodendron" or "Toxicodendron radicans") poison-ivy
- ria (drowned river valley) (drowned valley)
- (rice blast fungus) Magnaporthe grisea
- (rice paddy) paddy field
- rice paper
- (Rice-Paper Plant) Tetrapanax
- Richter magnitude scale (for measuring earthquakes)
- Rickettsia (parasitic bacteria which transmit diseases)
- ridge
- ridge and furrow
- ridge-push
- rift (geology)
- rift valley
- Rift Valley Fever (viral disease transmitted by mosquitoes)
- right of public access to the wilderness
- rim (craters)
- (rim of fire: see) Pacific Ring of Fire
- rime (frost)
- rinderpest (RP) (infectious viral disease of cattle)
- Rio Declaration on Environment and Development
- Río Plátano Biosphere Reserve
- (Rio Summit: see) Earth Summit
- rip current (rip tide) (riptide) (rip)
- riparian
- riparian forest
- riparian strips
- riparian water rights (riparian rights)
- Risø (Risø National Laboratory, in Denmark)
- riser (see usage in plumbing or sewage disposal)
- Risk and Safety Statements
- risk assessment
- risk for infection
- river (see same for "river mouth" and for "river system")
- (River Amazon) Amazon River
- (river bank: see) stream bed
- (river basin: see) watershed
- (river blindness) onchocerciasis (infectious disease, by a parasitic worm, causing blindness)
- (River Danube) Danube
- river delta
- (river gage) stream gage
- River Keepers
- River Landscapes
- (river lengths: see) list of rivers by length
- (River Nile) Nile
- (River Rhine) Rhine
- (River Rhône) Rhône River
- (river source: see) source (river or stream)
- riverboat
- (road accident: see) car accident
- road accident statistics on a model-by-model basis
- road bicycle
- (road bridge: see) bridge
- (road cone) traffic cone
- (road congestion: see) traffic congestion
- road fauna (road kill)
- road rage (road violence)
- road safety
- (road salt: see) sodium chloride
- (road traffic engineering: see) traffic engineering (transportation)
- Road Traffic Safety Law of the People's Republic of China
- road train
- road transport (road transportation)
- (road vehicle: see) road transport
- (roadable aircraft: see) flying car
- roadblock
- Roads Beautifying Association
- Roads to Resources Program
- roadworks
- Robert Bateman (British) (horticulturist)
- Robert Bateman (Canadian) (naturalist and wildlife artist)
- Robert Hart (forest gardener)
- Robert Hill (plant biochemist)
- Robert Watson (scientist) (on climate change and global warming)
- robot (see under Contemporary uses of robots and under Possible dangers)
- robotics
- (robust nuclear earth penetrator: see) nuclear bunker buster
- rock (geology)
- rock blasting
- rock climbing
- rock formation
- rock formations
- rock garden (rockery) (alpine garden)
- (rock oil: see) naphtha
- rocket
- rocket fuel
- rocket plane
- Rocky Mountain locust
- Rocky Mountains
- roe (egg)
- Roe v. Wade
- Röntgen equivalent man (rem)
- (Röntgen radiation: see) X-ray
- (Röntgen ray) X-ray
- rolling blackout
- Rolling Mill Mine (coal mine and disaster site)
- Roman candle
- Roman road
- roof garden
- room temperature
- (room temperature and pressure: see) normal temperature and pressure
- root
- (rot) decomposition
- (rotary intersection) roundabout
- (rotation of crops) crop rotation
- (roundabout intersection) roundabout
- Roundup (herbicides)
- roundworm (see under Parasitic species)
- Royal Botanic Gardens, Kew
- Royal Geographical Society
- Royal Parks of London
- Royal Society for the Prevention of Accidents
- Royal Society for the Prevention of Cruelty to Animals
- Royal Society of Wildlife Trusts (Royal Society for Nature Conservation)
- Royal Swedish Academy of Agriculture and Forestry
- royal forest
- royalty trust
- rubber
- Rubbia reactor
- (rubbish) waste
- (rubbish bags: see) bin bag
- (rubbish dump) landfill
- rubble trench foundation
- rumble strip
- (rummage sale) garage sale (a means of waste management)
- runoff (water)
- runway (airport runway)
- rural
- rural delivery service (Rural Free Delivery) (RFD)
- rural exodus (from rural areas to urban areas)
- rural flight (from the countryside to towns and cities)
- rural infrastructure
- rural migration (from rural areas to cities)
- Rural Utilities Service (Rural Electrification Administration)
- (Rush Limbaugh/Environmental wacko: see) Environmentalist Wacko, Econazi and Ecoterrorists
- rush hour
- rushlight (a type of candle)
- Russia and weapons of mass destruction
- Russian Federal Space Agency
- Russian honeybee (with natural mite resistance)
- Russian Plain
- (Russian space program: see) Soviet space program
- rust (a type of chemical corrosion)
- rust (fungus) (including many plant parasites)
- ryegrass (livestock feed, soil retainer, whose pollen causes hay fever)
S
- Sacramento National Wildlife Refuge Complex
- Saguaro National Park
- Sahara
- Sahara Desert (ecoregion)
- sailing
- sailing ship
- sailing vessel
- (sailplane) glider
- Saint Lawrence River
- salmonid susceptibility to whirling disease
- salt (general chemical term)
- salt water
- Salyut
- San Diego Wild Animal Park
- San Diego Zoo
- (San Francisco earthquake) 1906 San Francisco earthquake
- San Francisco volcanic field
- sanctuary (see under Animal sanctuary)
- (sanitary and shipping canal) Chicago Sanitary and Ship Canal
- (sanitary landfill) landfill
- sanitary sewer
- sanitation
- Sariska
- satellite (see under Artificial satellites)
- Satellite Internet
- satellite temperature measurements
- Save a Cup Recycling Company
- scalar energy
- scalar field
- School of Environmental Studies
- Science & Environmental Policy Project
- Scientific Committee on Problems of the Environment
- scientific drilling
- scientific opinion on climate change
- scorched earth
- Scottish Agricultural Revolution
- Scottish Crop Research Institute
- (Sea Islands Hurricane) 1893 Sea Islands Hurricane
- sea level
- (sea level pressure) atmospheric pressure
- sea level rise
- (sea life) marine biology
- Sea Shepherd
- sea surface temperature
- sea water
- (seabed and foreshore legislation, New Zealand) New Zealand foreshore and seabed controversy
- Seabrook Nuclear Power Station
- seafloor spreading
- seaplane
- seasonal human migration
- Seattle Aquarium
- Seattle Japanese Garden
- Seaworld
- SeaWorld & Busch Gardens Conservation Fund
- sediment
- seismology
- seismometer
- Sequoia National Park
- Serengeti National Park
- seven-generation sustainability
- severe weather
- severe weather terminology
- sewage
- sewage collection and disposal
- Sewage Treatment
- sewage treatment
- shanty town
- (Shanxi earthquake) 1556 Shaanxi earthquake
- sharecropping
- Shark Bay, Western Australia (see under "Shark Bay World Heritage Site")
- sheep husbandry
- (Shell Oil) Royal Dutch Shell
- shelter
- shifting cultivation
- Ship-Submarine recycling program
- ship breaking (ship recycling)
- ship transport
- shipping
- shipwreck
- shipwrecks of the 1913 Great Lakes storm
- shrimp farm (see under Ecological impacts)
- shrubland
- Siberian natural resources
- sick building syndrome
- (side effects of chemotherapy) chemotherapy (see under Side-effects)
- Sierra Club
- Sierra Club of/du Canada
- Sierra National Forest
- Silicon Valley
- silkworm
- silo
- silt
- silviculture
- SimAnt
- SimEarth
- SimFarm
- SimIsle
- SimLife
- SimPark
- SimSafari
- SimTown
- simian immunodeficiency virus
- Singapore River
- Singapore Zoological Gardens
- sinkhole
- Sites in the UK recognised for their importance to
- Site of Special Scientific Interest
- (Site of the First Self-Sustaining Nuclear Reaction) Metallurgical Laboratory
- sky
- (sky cover) cloud
- sky island
- skyglow
- Skylab
- (skylift) aerial tramway
- Slow Food
- slow sand filter bed
- sluice
- slum
- slurry
- (slurry bomber) aerial firefighting
- slurry pipeline
- small population size
- smallpox
- smog
- smoke
- smoke-free restaurant
- Smokefree Environments Amendment Act
- smoking ban
- snow
- snow removal
- (snow storm) winter storm
- snowmobile (snow scooter)
- soap (see under Use)
- social ecology
- socially responsible investing
- Society for the Prevention of Cruelty to Animals
- (Society For The Promotion Of Nature Reserves) Royal Society of Wildlife Trusts
- Society of Ethical and Religious Vegetarians
- Society of Exploration Geophysicists
- Society of Petroleum Engineers
- Society of Plastics Engineers
- sociobiology
- sociology of disaster
- soft energy path
- soft water
- softwood
- soil (see also list of soil topics)
- solar power (see also list of solar energy topics)
- solid fuel (solid propellant)
- solid rocket (solid-fuel rocket)
- solid-oxide fuel cells
- solid state nuclear track detector
- (solid waste management: see) waste management
- solubility pump
- songbird
- sonic boom
- sonic bullet
- sonic cavitation
- (sonic refrigeration) thermoacoustic refrigeration
- sonic weaponry
- sound (see also list of environmental sound topics)
- (sour acid gas) acid gas (acid sour gas) (sour gas)
- source (river or stream)
- South Atlantic Anomaly
- South Australian gulf drainage division
- South Carolina Department of Health and Environmental Control
- South Coast Botanic Garden
- South Deccan Plateau dry deciduous forests
- South Korean nuclear research programs
- South Maury Island environmental issues
- South Texas Nuclear Generating Station
- South Western Ghats moist deciduous forests
- South Western Ghats montane rain forests
- Southampton Oceanography Centre
- (Southeast Asia tsunami) 2004 Indian Ocean earthquake
- Southern California Earthquake Center
- Southern Great Lakes Derecho of 1991
- Southern Great Lakes Derecho of 1998
- Southern Ocean
- Southwest Agricultural University
- Soviet atomic bomb project (Soviet nuclear program)
- space debris
- space disaster
- Space Environment
- Space Environment Center
- space exploration
- Space Frontier Foundation
- space geostrategy
- space habitat
- Space Preservation Treaty
- Space Shuttle
- space station
- space technology
- space tourism
- space transport
- Space Transport Corporation
- space weather
- Special Area of Conservation
- Special Protection Area
- special report on emissions scenarios
- speciecism
- species
- species discovery curve
- (species loss) extinction
- species richness (species diversity)
- speciesism
- specific fuel consumption
- specific humidity
- specific storage (see same for "storativity" and "specific yield")
- spectrum
- spectrum analyzer
- speleology
- (spelunking) caving
- (spider plant) Chlorophytum comosum
- spore
- sport fishing
- sport utility vehicle (SUV) (see under Fuel economy and under Response to criticisms)
- spring (season)
- spring (water)
- square foot gardening
- Sri Lankan birds: non-passerines
- Sri Lankan birds: passerines
- (standard atmospheric pressure) atmospheric pressure (standard atmosphere)
- standard conditions for temperature and pressure
- (standard genetic code) genetic code
- standard of living in India
- standards organizations
- Stanley Park
- star
- star atlas
- star catalogue
- State Farm Insurance
- State University of New York College of Environmental Science and Forestry
- (Statement of Forest Principles) Forest Principles
- stationary steam engine
- steam (see list of steam energy topics)
- (stellar navigation) celestial navigation
- (stellar wind) solar wind
- Stellarium
- sterility
- sterilization
- (sterilizer) autoclave
- stink
- stink bomb
- (stink damp) hydrogen sulfide (sulfane) (sulfur hydride) (dihydrogen monosulfide) (sulfurated hydrogen) (sewer gas)
- (stock farming) agriculture
- storage heater
- (storativity: see) specific storage
- storm
- storm cellar
- storm chasing
- storm drain (storm sewer) (stormwater drain)
- (storm flood) storm tide
- (Storm of the Century 1993) 1993 North American Storm Complex
- (storm sewer) storm drain
- storm surge
- storm tide
- storm track
- storm warning (see same for "storm watch")
- storm water
- storm-scale
- stove
- (straight veg: see) veganism
- straight vegetable oil (SVO)
- strategic bombing
- strategic bombing during World War II
- strategic bombing survey
- Strategic Environmental Assessment (SEA) (Strategic Environmental Impact Assessment) (SEIA)
- strategic materials
- Strategic Nuclear Command (Strategic Forces Command)
- Strategic Petroleum Reserve
- stratification
- stratigraphy
- stratopause
- stratosphere
- (Stratospheric Ozone: see) ozone layer
- stratovolcano (composite cone) (composite volcano)
- stream
- stream bed (stream bank)
- stream capture
- (stream channelization) channelization
- stream gage (steam gauge)
- stream gradient
- stream terrace
- (street car) tram
- (street cleaner) street sweeper
- street light (street lamp) (light standard) (lamp standard)
- (street railway: see) tram
- street sweeper (street cleaner)
- Stretham old engine
- strict nature reserves of Finland
- strip farming
- strip mining
- structural biology
- structural genomics (structural informatics)
- structural geology
- Student Conservation Association
- Student Environmental Action Coalition
- Student Space Exploration & Technology Initiative
- (Styrofoam) polystyrene
- sub-alpine meadow
- sub-aquatic warfare
- sub-bituminous coal
- (sub-freezing: see) freezing
- sub-molecular engineering
- sub-orbital spaceflight
- Sub-Saharan Africa
- sub-zero (physics)
- Sub-Zero Refrigerator
- (subaquatics: see) diving
- subarctic
- subarctic climate
- subatomic particles
- subcompact car
- subduction
- subglacial lake
- subirrigation
- sublimation (physics)
- submarine
- (submarine mine) naval mine
- (submarine recycling) Ship-Submarine recycling program (SRP)
- submarine warfare
- submergent coastline
- submersible
- submersible pump
- subsistence agriculture
- subsistence farming (sustenance farming)
- (substance [chemical]) chemical substance
- (substation) electrical substation
- (subsurface drip irrigation) drip irrigation
- subterranean river
- subterranean rivers in Hong Kong
- subterranean rivers of London
- subtropical
- subtropical climate
- subtropical cyclone (see same for "subtropical depression" and for "subtropical storm")
- (subtropical dry forest) tropical and subtropical dry broadleaf forests
- (Subtropical Storm Nicole) 2004 Atlantic hurricane season
- subtropics
- suburb (suburban area)
- (suburban rail) (suburban railway) (suburban train) regional rail
- (suburban sprawl) urban sprawl
- suburbanization
- suburbia
- (subway: see) rapid transit
- (subway listing: see) list of rapid transit systems
- (subway station: see) metro station
- subzero
- suction dredge
- suction dredger
- Sudbury Neutrino Observatory
- sudden downturn of F5 tornadoes
- sudden ionospheric disturbance
- sudden stratospheric warming
- Suez Canal Zone
- suicide bombing
- suicide weapon
- suitcase bomb
- sulfate-reducing bacteria
- (summer 2004 hurricanes: see) 2004 Atlantic hurricane season
- (summer daylight saving time) daylight saving time (DST) (summer time)
- sump
- (sump oil) tramp oil
- sump pump
- Sundarbans
- Sundarbans National Park
- super hydrophilicity (see "organic compounds")
- (superbug: see) antibiotic resistance
- supercell (supercell thunderstorm)
- supercooling
- supercow (dairy)
- supercritical water oxidation (see "hazardous wastes")
- superculture (see "extreme global luxury")
- Superfund (Comprehensive Environmental Response, Compensation, and Liability Act) (CERCLA)
- (superheated steam: see) steam
- superhighway
- superliquid (see "dilution refrigerators" under Applications)
- supermarket (see "dependency on the motor car" under History) (see list of supermarkets)
- supertanker
- supervolcano
- supplementary protection certificate (intellectual property right for medicinal products and for plant protection products)
- supply and transport
- surface air temperature
- surface mining
- (surface run-off) overland flow
- (surface temperature: see) temperature
- surface temperature inversion
- surplus product
- surplus store
- survival kit
- survival skills
- sustainability (see list of environmental sustainability topics)
- sustainable agriculture
- (sustenance farming) subsistence farming
- swamp
- swamp cooler
- (swamp gas: see) natural gas
- (sweat house) sauna
- sweatshop (contrast ergonomics)
- (swidden farming) slash and burn
- swine flu
- Swiss National Park (see list of national parks)
- swords to ploughshares
- Sydney underground railways
- symbiosis (see also list of symbiotic relationships)
- synergy (see under Health Effects of Pesticides)
- synoptic scale
- synoptic scale meteorology
- synoptic science
- synthesis
- synthetic biology (see same for "synthetic gene")
- synthetic crude
- synthetic element
- synthetic fiber (see same for "synthetic textile")
- (synthetic gas) syngas
- Synthetic Genomics
- synthetic oil
- synthetic polymer (plastics)
- synthetic radioisotope
- synthetic rubber
- (synthetic turf) artificial turf
- Systema Naturae
- systematic element name
- systematic name
- systematics
- (systemic antibiotic: see) antibiotic
- systemic pesticide
- systems biology
- systems engineering (systems design engineering)
- (systems of zoological classification: see) scientific classification (biological classification)
- systems science
- syzygy
T
- tailings
- (tailpipe) exhaust pipe
- (Tamiflu: trade name of) Oseltamivir (an antiviral drug)
- tanker
- Tanzania Wildlife Research Institute
- tar pit
- tar sand
- tar shale
- Tchernobyl
- technology
- tectonic plate
- tectonic uplift
- (tectonics) (tectonism) plate tectonics
- telegeodynamics
- telehealth
- telepresence
- telerobotics
- (telesurgery) remote surgery
- (teletherapy) external beam radiotherapy
- telework
- temperate broadleaf and mixed forests
- temperate coniferous forests
- temperate forest
- temperate grasslands, savannas, and shrublands
- temperate rain forest
- temperature extreme
- temperature inversion
- temperature record
- temperature record of the past 1000 years
- Tennessee Valley Authority
- tensiometer
- teratogenesis
- teratology
- Terminator Technology (in agriculture)
- termite
- Terra Nova (oil field)
- Terra Nova National Park
- terrace (agriculture)
- terraforming
- (terrain) topology
- terrarium
- terrestrial ecoregion
- (terrestrial magnetism) Earth's magnetic field
- territorial waters
- Tesla effect
- Texaco
- The Skeptical Environmentalist
- (The Sundarbans) Sundarbans
- The Weather Channel
- The Weather Company
- The Weather Network
- theoretical biology
- theoretical ecology
- thermal equator
- (thermal fusion) nuclear fusion
- thermal pollution
- (thermal power plant) power station
- thermal radiation
- thermal reactor
- (thermonuclear explosion) nuclear explosion
- (thermonuclear fission) nuclear fission
- (thermonuclear fusion) nuclear fusion
- (thermonuclear weapon) nuclear weapon
- Thetford Mines, Quebec
- thimerosal (thimerosol) (thiomersal)
- thirty most populous cities in the world
- Three Mile Island
- thunder
- thundersnow
- thunderstorm
- tick-borne disease
- tick-borne meningoencephalitis
- (tidal flat) mudflat
- tidal force
- (tidal marsh) saltmarsh
- tidal power (tidal energy)
- (tidal surge) storm surge
- tidal wave
- tide pool
- tiger
- Tigris-Euphrates river system
- tillage (tilling)
- timber
- timeline of environmental history of New Zealand
- timeline of solar cells
- timeline of solar energy
- timeline of steam power
- timeline of the 2004 Indian Ocean earthquake
- tips on reducing water pollution
- Titan (rocket family)
- tobacco
- tobacco industry
- tobacco smoking
- toilet
- Tokyo Electric Power
- Tokyo Metro
- topocide
- topography
- topology (disambiguation)
- tor
- tornado
- tornado warning
- tornado watch
- Toronto Environmental Coalition
- Toronto Transit Commission
- Toronto waterfront
- Toronto Zoo
- Total Ozone Mapping Spectrometer
- tourism
- Toxic Substances Control Act
- (Toxic Substances List) RTECS
- toxic capacity
- (toxic racism) environmental racism
- toxic shock syndrome
- toxic waste
- toxication
- toxicity
- Toxicodendron
- toxicogenomics
- toxicokinetics
- toxicology
- toxics use reduction
- toxin
- toxoid
- Toxoplasma gondii
- traceability
- trade
- trade route
- trade war over genetically modified food
- trade wind
- (tradeable emission permits) emissions trading
- traffic
- traffic analysis zone
- traffic congestion (traffic jam)
- (traffic safety) road safety
- (traffic accident) road accident
- traffic engineering (transportation)
- traffic wave
- trail blazing
- trail
- train
- (train à grande vitesse) TGV
- tramway
- (Transboundary Protected Area) Peace park
- (transboundary waters) international waters
- transgenic animals
- transgenic organism
- transgenic plants
- (transgenics) genetically modified organism
- transit
- (Transitway) Ottawa Transitway
- (transmission grid) electric power transmission
- transplantation
- transport
- transportation
- trash-to-energy plant
- travel
- treated lumber
- treaty
- Treaty for the Limitation of Naval Armament
- Treaty for the Prohibition of Nuclear Weapons in Latin America and the Caribbean
- Treaty of Paris
- Treaty of Versailles
- Treaty on the Non-Proliferation of Nuclear Weapons
- tree conservation areas in Singapore
- (tree farm) plantation
- (tree hugger) Chipko movement
- tree lawn
- tree pinning
- tree spiking
- (trekking) hiking
- trekking peak
- (trellis drainage system: included in) drainage system
- trespassing (see near bottom of page)
- tricycle
- (trinitroglycerin) nitroglycerin
- trinitrotoluene (TNT) (Trotyl)
- tropical and subtropical coniferous forests
- tropical and subtropical dry broadleaf forests
- tropical and subtropical grasslands, savannas, and shrublands
- tropical and subtropical moist broadleaf forests
- tropical cyclone (tropical storm) (typhoon) (hurricane)
- tropical cyclone warnings and watches
- (Tropical Research Institute) Smithsonian Tropical Research Institute
- tropical savanna
- tropical disease
- troposphere
- Tropospheric Emission Spectrometer
- tropospheric ozone
- trypanosome
- tsunami
- (Tsunami Disaster) 2004 Indian Ocean earthquake
- Tsunami PTSD Center
- tsunami warning system
- tuberculosis
- tuna
- Tunguska event
- tunnel
- types of crude oil in Nigeria
- types of radio emissions
- types of rural communities
- (typhoon) tropical cyclone
- (téléphérique) aerial tramway
U
- UK sites recognised for their biodiversity conservation importance
- ultrahazardous activity
- ultraviolet
- unburned hydrocarbon
- underground power station
- underwater habitat
- unified neutral theory of biodiversity
- upper atmosphere
- uranium
- urban agriculture
- urban bicycling
- urban ecology
- urban heat island
- urban planning
- urban sprawl
- urban studies
- UV index
V
- vaccination
- vaccine
- Vaccine Adverse Event Reporting System (in the US)
- vaccine controversy
- vaccine shortage of 2004
- vaccine trial
- Vaccines and Fetal Tissue
- Vaccines for the New Millennium Act (in the US)
- vaccinia
- vaccinology
- value of Earth
- value of life
- (vapor trail) contrail
- vegan
- vegetarian
- venom
- village green
- volcano
- volcanism
- voluntary simplicity
W
- walking
- waste
- waste management
- waste vegetable oil
- wastewater
- water-cooling
- water-mill
- water-wheel
- (water-wise gardening) xeriscaping
- water conservation
- water contamination
- water desalination (desalination)
- water dispute
- Water Fluoridation controversy
- water fuel cell
- water industry
- water pipe
- water pollution
- water privatization
- water purification
- water quality
- water quality modelling
- water resources
- water supply
- water supply network (water supply system)
- water treatment
- (water well) well
- wave power
- weapons of mass destruction
- weathering
- weathering of buildings
- weatherization
- weed control
- (weed wacker) (weedeater) string trimmer
- (weedkiller) herbicide
- weedy species
- weevil
- well
- well drilling
- well logging
- well poisoning
- well water
- (Wetlands Centre) WWT London Wetlands Centre
- Wetlands International
- wetlands
- wetlands conservation
- whale watching
- whaling
- (wheat blast) Magnaporthe grisea
- wheat mildew
- (wheat rust) rust (fungus)
- (white biotechnology, included in) biotechnology
- (wholphin) wolphin
- wildfire
- wildlife refuge
- Wildlife Trust (disambiguation)
- Willamette National Forest
- (Wilson cloud chamber) cloud chamber
- (Wilson cycle) Supercontinent Cycle
- Wind Cave National Park
- Wind River Experimental Forest
- wind chill
- wind energy
- wind farm
- wind jet
- wind power
- wind turbine
- (wind vane) weather vane
- windbreak
- windcatcher
- windmill
- (Windscale: see) Sellafield
- Windscale fire
- windstorm
- winter storm
- Winter Storm Warning
- Winter Weather Advisory
- wise use
- wolf hunting
- wolf hunting controversy
- wood fuel
- wood gas
- wood management
- (wood mizer) portable sawmill
- woodland
- (woolly mammoth) mammoth
- World's Most Livable Cities
- World3
- World3 nonrenewable resource sector
- World Animal Day
- World Asthma Day
- World Climate Change Conference
- World Climate Conference
- World Climate Programme
- World Climate Report
- World Climate Research Programme
- World Commission on Environment and Development
- World Conference on Disaster Reduction
- World Day for Water (unofficially, World Water Day)
- (World Environment Day) UN World Environment Day
- World Food Conference
- World Food Day