User:Wavelength/Articles userfied/List of environmental topics/A


 * A

The items listed on this page form part of the multi-page list of environment topics.

This is a list of topics related (in whole or in part) to (a) phenomena in the natural environment which have a definite or significantly possible connection with human activity or (b) features of human activity which have a definite or significantly possible connection with the natural environment, even if the connection is made indirectly through the built environment. For example, hamster has been included because the effect on the built environment can affect the natural environment. Also, factory farming (often practiced indoors) has been associated with epidemics, which do not stay indoors.

The connections can be positive (even remedial) or negative or both. Some introduced species intended to benefit the ecosystem have acted as invasive species, damaging the ecosystem. Also, different sources of energy development have both pros and cons. Furthermore, an environmental topic can be such for multiple reasons at one time, as in the case of resource extraction and processing; commodity distribution, use, and misuse; and waste management.

Contents: A-Aa | Ab | Ac | Ad | Ae | Af | Ag-Agq | Agr-Agrh | Agri | Agrj-Agrn | Agro | Agrp-Agrz | Ags-Agz | Ah | Ai-Aiq | Air (separate word) | Air (in hyphenated compound words) | Air (in solid compound words) | Ais-Aiz | Aj-Ak | Al-All | Alm-Alz | Am-Amd | Ame | Amf-Amz | An-Anh | Ani | Anj-Ans | Ant | Anu-Anz | Ao | Ap | Aq | Ar-Arf | Arg-Arz | As-Asm | Asn-Asz | At-Atl | Atm | Atn-Atz | Au-Aur | Aus | Aut-Auz | Av | Aw-Az

A-Aa

 * A-CHAMP (Advocates for Children's Health Affected by Mercury Poisoning) (in the US)
 * A4W reactor (a type of nuclear reactor)
 * (aa [lava]: see) lava (see under ʻAʻā)
 * Aarhus Historic Shipwreck (in Australia)

Ab

 * abandoned village (see under Climate change and under Black Death)
 * (ABC weapons [atomic, biological, chemical]: see) weapon of mass destruction (WMD)
 * abiogenic petroleum origin (see "environmentalists" in paragraph 3 under Petroleum origin, peak oil, and politics)
 * abiotic components
 * ablation
 * aboriginal whaling
 * abrupt climate change
 * absolute dating (in archaeology)
 * absorbed glass mat (AGM) ("a class of lead-acid battery")
 * absorption (acoustics)
 * absorption refrigerator
 * abundance of the chemical elements
 * abyssal plain (in oceanography)
 * abyssal zone (in oceanography)
 * (abyssopelagic zone: see) pelagic zone (in oceanography)

Ac

 * accident (see list of internal links under See also)
 * accident blackspot
 * acclimatization (acclimatisation) (acclimation)
 * accordion effect
 * (acid deposition: see) acid rain
 * acid gas (sour gas) (sour acid gas) (acid sour gas)
 * acid mine drainage (AMD) (acid rock drainage) (ARD)
 * acid rain
 * acoustic ecology (soundscape ecology)
 * acoustic mirror
 * acoustic thermometry (in oceanography) (see under Marine Mammal Issue)
 * acoustic torpedo
 * acoustical engineering
 * Acoustical Society of America
 * Acoustically Navigated Geological Underwater Survey (ANGUS)
 * acoustics
 * actinism ("a property of radiation")
 * actinometer ("mainly used in meteorology to measure solar radiation")
 * action on climate change (disambiguation page)
 * Action on Smoking and Health (ASH)
 * activated alumina (see "filter" in preamble and see under Uses)
 * activated carbon (activated charcoal) (activated coal) (see under Environmental applications)
 * active fault (in geology)
 * Active Fuel Management (for automobiles)
 * active layer (in soil science)
 * active noise control (ANC) (noise cancellation) (active noise reduction) (ANR) (antinoise)
 * active solar
 * active structure (smart structure) (adaptive structure) (in engineering)
 * active vibration control
 * acute toxicity

Ad

 * Adams Mine (in Ontario in Canada) (see under Landfill proposal)
 * adaptive management
 * adaptive reuse (useful for managing resources and waste)
 * adaptive strategies
 * Adbusters (magazine) (see "environmental ... consequences" under Full cost accounting and see "environmental dangers" and "genetically modified food" under Neo-luddism)
 * additive white Gaussian noise (AWGN) (see paragraph 3)
 * Addo Elephant National Park (in South Africa) (see "Big 7" in paragraph 4)
 * adequately wet (said of asbestos)
 * Administrator of the Environmental Protection Agency (in the US)
 * Administrator of the Pipeline and Hazardous Materials Safety Administration (in the US)
 * adobe (building material) (see under Thermal properties)
 * Adsorption Method for Sampling of Dioxins and Furans (AMESA)
 * Advanced Boiling Water Reactor (ABWR)
 * advanced gas-cooled reactor (AGR)
 * Advanced Land Observation Satellite (ALOS) (Daichi) (Japanese satellite)
 * advanced meat recovery (AMR) (see "BSE contamination" in paragraph 3)
 * Advanced Microwave Sounding Unit (AMSU) (for environmental measurements)
 * Advanced Pressurized Water Reactor
 * Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER)
 * Advanced Weather Interactive Processing System (AWIPS) (of the US)
 * advection (in meteorology and in oceanography)
 * Adventure Aquarium (in New Jersey in the US)
 * Adventure Cycling Association (in the US)
 * adventure recreation
 * adventure tourism
 * Advisory Committee on Human Radiation Experiments
 * (Advocates for Children's Health Affected by Mercury Poisoning) A-CHAMP (in the US)

Ae

 * Aegean Sea (oil spill)
 * (aeolian processes) eolian processes (processes pertaining to the activity of the winds)
 * aerated lagoon (to promote the biological oxidation of wastewaters)
 * aerial application (crop dusting) (in agriculture)
 * aerial archaeology
 * (aerial bombing during World War II: see) strategic bombing during World War II
 * aerial bombing of cities
 * aerial firefighting
 * (aerial interdiction) air interdiction (in aerial warfare)
 * aerial lift (a means of transport)
 * Aerial Lift Bridge (earlier known as the Aerial Bridge or Aerial Ferry Bridge) (in Minnesota in the US)
 * aerial perspective (atmospheric perspective)
 * aerial photography (see paragraph 3 of preamble)
 * aerial refueling (air refueling) (in-flight refueling) (IFR) (air-to-air refueling) (AAR) (see paragraph 2 under History and development)
 * aerial survey
 * aerial tramway (cable car) (ropeway) (téléphérique) (Seilbahn)
 * aerial warfare
 * aerial-seeding
 * aeroacoustics
 * Aerobee (rocket) (in the US)
 * aerobic organism (aerobe)
 * aerobiology
 * aerogel (frozen smoke) (solid smoke) (blue smoke) (see under Properties and under Uses)
 * aerography (meteorology)
 * aerology
 * aeronautics
 * Aeronomy Laboratory (AL)
 * aeroplankton
 * aerosol
 * aerosol paint
 * aerosol spray
 * aerospace
 * aerospace engineering
 * aerospaceplane
 * aesthetics (esthetics) (æsthetics) (see under Urban life and under Landscape design)

Af

 * afforestation
 * Afghanistan Meteorological Authority
 * aflatoxin (see preamble and see under Contamination conditions)
 * African clawed frog (see paragraph 1 under African clawed frogs as nuisances)
 * African Conservation Foundation
 * African Finfoot (see under Status and Conservation)
 * African Great Lakes
 * African Nuclear Weapons Free Zone Treaty (Treaty of Pelindaba}
 * African Penguin (Blackfooted Penguin) (formerly Jackass Penguin) (see under Threats)
 * African Petroleum Producers Association (APPA)
 * African plate (a tectonic plate)
 * African rainforest
 * (African sleeping sickness) sleeping sickness (African trypanosomiasis) ("a parasitic disease in people and animals")
 * African Well Fund
 * Africanized bee (killer bee)
 * Afrique verte ("Green Africa") (non-governmental organization)
 * afterburner (see "high fuel consumption" under Limitations)
 * afterdamp
 * aftermarket fuel economy device
 * aftermath of World War I (see under Influenza pandemic and under Remains of ammunition)
 * aftershock
 * Aftershock: Earthquake in New York (television movie)

Ag-Agq

 * Agence métropolitaine de transport (AMT) (Metropolitan Transportation Agency) (in Greater Montreal in Canada)
 * Agency for Toxic Substances and Disease Registry (ATSOR) (in the US)
 * Agency of Nuclear Projects (Nuclear Waste Project Office) (in Nevada in the US)
 * Agenda 21 (a UN programme related to sustainable development)
 * Agent Blue (herbicide)
 * Agent Green ("powerful herbicide and defoliant")
 * Agent Orange ("powerful herbicide and defoliant")
 * Agent Pink ("powerful herbicide and defoliant")
 * Agent Purple ("powerful herbicide and defoliant")
 * Agent White ("powerful herbicide and defoliant")
 * aggregate base
 * aggressive class minesweeper

Agr-Agrh

 * Agra canal (in India)
 * agrarian law (in the Roman Empire)
 * agrarian reform
 * agrarian society
 * Agreed Measures for the Conservation of Antarctic Fauna and Flora
 * Agreement concerning the Manufacture of, Internal Trade in and Use of Prepared Opium
 * Agreement for the Control of Opium Smoking in the Far East
 * Agreement on Agriculture (see "environmental programs" in paragraph 1 under Domestic support)
 * Agreement on the Application of Sanitary and Phytosanitary Measures
 * Agreement on the Conservation of Albatrosses and Petrels

Agri

 * (AGRI) Committee on Agriculture and Rural Development (in Europe)
 * agri-entertainment
 * agribusiness
 * agrichemical (agrochemical)
 * Agricultural Adjustment Act (AAA) (in 1933) (in the US)
 * agricultural aircraft
 * Agricultural and Food Research Council (AFRC) (in the UK)
 * agricultural biodiversity
 * agricultural cycle
 * agricultural economics
 * agricultural education
 * agricultural engineering
 * agricultural experiment station
 * agricultural fencing
 * agricultural history of Peru
 * agricultural history of the United States
 * Agricultural Land Reserve (ALR) (in British Columbia in Canada)
 * agricultural lime
 * agricultural machinery
 * Agricultural Marketing Service (in the US) (see "pesticide" in paragraph 3)
 * agricultural philosophy
 * agricultural policy (see under Environmental Protection and Land Management and under Environmental programs)
 * agricultural productivity (see also list of countries by GDP sector composition)
 * agricultural revolution (disambiguation page)
 * agricultural science
 * Agricultural Stabilization and Conservation Service (ASCS) (in the US)
 * agricultural wastewater treatment
 * agriculture (see under Environmental impact and under Genetic erosion in agricultural and livestock biodiversity)
 * Agriculture and Agri-Food Canada (Department of Agriculture and Agri-Food)
 * agriculture and aquaculture in Hong Kong
 * Agriculture, Fisheries and Conservation Department (Agriculture and Fisheries Department before 2000) (in Hong Kong)
 * agriculture, forestry, and fishing in Japan
 * agriculture in Australia
 * agriculture in Greece
 * agriculture in Imperial Russia
 * agriculture in Thailand
 * agriculture in the Soviet Union
 * agriculture in the United States
 * agriculture of Communist Czechoslovakia
 * Agriculture Street Landfill (in New Orleans in the US)
 * AgriQuality Limited (in New Zealand and in Australia)

Agro

 * Agrobacterium ("a genus of bacteria that cause tumors in plants") (see under Agrobacterium in biotechnology)
 * Agrobacterium tumefaciens
 * agroecology
 * agroforestry
 * agrogeologist
 * agrogeology
 * agrology
 * agrominerals
 * agronomist
 * agronomy
 * agrophysics
 * agrostology ("the scientific study of grasses")

Ai-Aiq

 * aid climbing (see "clean aid" in paragraph 2 under Technique)
 * AIDS origin

Air (separate word)

 * (air: 1 meaning selected from disambiguation page)
 * Earth's atmosphere
 * Air Accidents Investigation Branch (in the UK)
 * air burst
 * air conditioning
 * air cooling
 * air corridor
 * (air curtain: 2 meanings from disambiguation page)
 * "An air curtain is a method of containing oil spills. Air bubbling through a perforated pipe causes an upward water flow that slows the spread of oil. It can also be used to stop fish from entering polluted water."
 * air curtain (ventilation)
 * (air dispersion modeling) atmospheric dispersion modeling
 * air engine (an emission-free piston engine)
 * air filter
 * air freshener
 * air horn (a device designed to create an extremely loud noise)
 * Air India Flight 182 (in 1985) (using a Boeing 747 which exploded south of Ireland)
 * air ioniser
 * air mass (airmass) (in meteorology)
 * air navigation
 * air parcel (in meteorology)
 * air pollution
 * air pollution in British Columbia (in Canada)
 * air preheater
 * air purifier
 * Air Quality Index (AQI)
 * (air quality modeling: see) atmospheric dispersion modeling
 * air rights
 * air safety (see under Air safety topics)
 * air shower (disambiguation page)
 * air shuttle
 * air sports
 * air traffic control (ATC)
 * air traffic controller
 * air worthiness certificate (in the UK)

Air (in hyphenated compound words)

 * (air-conditioning system: see) HVAC
 * air-fuel ratio
 * air-ground radiotelephone service
 * air-independent propulsion (AIP) (in submarines)
 * air-raid shelter
 * air-to-air missile (AAM)
 * air-to-surface missile (air-to-ground missile) (ASM) (AGM)

Air (in solid compound words)

 * AirBART (shuttle bus service) (in California in the US)
 * airboat
 * Airborne Collision Avoidance System (ACAS)
 * Airborne Early Warning (AEW)
 * airborne leaflet propaganda (a form of littering)
 * Airborne Science Program (by NASA)
 * Airborne Warning and Control System (AWACS)
 * airborne wind turbine
 * AirCare (vehicle emissions testing program) (in British Columbia in Canada)
 * aircraft
 * Aircraft and Railway Accidents Investigation Commission (ARAIC) (in Japan)
 * aircraft emergency frequency (used internationally)
 * aircraft noise
 * Aircraft Reactor Experiment (ARE) (in Idaho in the US)
 * Aircraft Rescue and Firefighting
 * airlift (dredging device)
 * airport (see under Environmental concerns)
 * airshed (in meteorology)
 * airship
 * Airship Holland (see under Environmentally friendly and under Safety)
 * Airship Italia
 * (Airship Norge: see) Norge (airship)
 * airspace
 * airspace class
 * Airtrain (Brisbane) (rail service) (in Australia)
 * AirTrain (SFO) (people mover) (in California in the US)
 * AirTrain JFK (rapid transit system) (in New York City)
 * AirTrain Newark (monorail system) (in New Jersey in the US)

Al-All

 * Al Ayyat train disaster (in 2002) (in Egypt)
 * Al Gore (see under Promoting environmental awareness)
 * Alaska Current
 * Alaska Game Management Units
 * Alaska Marine Highway (Alaska Marine Highway System) (AMHS) (a ferry service) (in Alaska in the US)
 * Alaska Wildlife Conservation Center
 * Alaska Zoo
 * albatross (seabird) (see "threatened with extinction" in paragraph 3 of preamble)
 * Albuquerque International Balloon Fiesta (in ˜ew Mexico in the US)
 * Alert, Nunavut (in Canada) ("the northernmost permanently inhabited place in the world")
 * Aleutian Island earthquake (in 1946) (in area of Alaska)
 * algae (see under Fertilizer and under Energy source and under Pollution control, all under Uses of algae)
 * algal bloom
 * Alkali Act 1863 (in the UK)
 * alkaline battery
 * alkaline fuel cell (AFC)
 * All India Biotech Association (AIBA)
 * all-inclusive resort (see under Pros and cons of all-inclusive resorts)
 * all-terrain vehicle (ATV) (see under Criticisms of ATVs)
 * allergen
 * allergy (see under Cause and under Epidemiology)
 * alligator weed ("an invasive species") (see "biological control" in paragraph 4)
 * allotment (gardening) (in the UK)
 * alluvial desert (see "irrigation" in article)
 * alluvial fan
 * alluvial plain
 * alluvion
 * alluvium

Alm-Alz

 * alpha decay (see under Uses and under Toxicity)
 * alpha diversity
 * Alpine National Park (in Australia) (see pararaphs 2 and 3)
 * AlpTransit (involving tunnels) (in Switzerland)
 * alternative biochemistry
 * alternative fuel
 * alternative fuel vehicle
 * alternative propulsion
 * alternative theories regarding Hurricane Katrina
 * altocumulus castellanus cloud
 * altocumulus cloud
 * altocumulus mackerel sky (mackerel sky)
 * aluminium (aluminum) (see "recycling" under Aluminium metal production and refinement and see under Precautions)

Am-Amd

 * amalgam (see under Mining)
 * Amanita phalloides (death cap) (introduced soecies) (poisonous fungus)
 * amaranth (dye) ("suspected carcinogen")
 * amateur astronomy
 * Amateur Gardening (magazine) (British)
 * amateur radio (ham radio)
 * amateur radio emergency communications
 * Amateur Radio Emergency Service (ARES) (in the US and Canada)
 * amateur radio frequency allocations
 * amatoxin
 * Amazon Basin (in South America)
 * Amazon Rainforest (in South America)
 * Amazon River (in South America)
 * (Amazon River Dolphin) boto (see under Conservation)
 * amber (see "mining" under Amber locations)
 * ambergris (see under Source)
 * ambient energy exchange (AEE)
 * ambient food
 * ambient noise level (room noise level)

Ame

 * (ameliorative waste: see) waste (law) (see point 3 in first list)
 * American Academy of Forensic Sciences (AAFS)
 * American Agricultural Economy in the 1920s-1940 (see "droughts" in paragraph 2 under 1920s)
 * American Airlines Flight 11 (see "fire and smoke" under Crash)
 * American Airlines Flight 77 (see "fire and smoke" under Crash)
 * American Airlines Flight 191 (on May 25, 1979)
 * American Airlines Flight 587 (on November 12, 2001)
 * American Association of Petroleum Geologists (AAPG)
 * American Astronautical Society (AAS)
 * American Astronomical Society (AAS)
 * American Beaver (see "Their dams help" in paragaph 6 under Description and see "their dams can cause flooding" in paragraph 1 under Threats)
 * American Birding Association (ABA)
 * American Bison (buffalo) (see under Hunting and under Dangers)
 * American Black Vulture (see under Relationship with humans)
 * American Bottom ("a flood plain of the Mississippi River")
 * (American burying beetle) Nicrophorus americanus (giant carrion beetle) ("an endangered species")
 * American Chemistry Council (ACC)
 * American College of Emergency Physicians (ACEP)
 * American Conference of Governmental Industrial Hygienists (ACGIH)
 * American Council on Science and Health (ACSH)
 * American Crocodile (IUCN status "vulnerable")
 * American Cryonics Society (ACS)
 * American Discovery Trail ("a coast-to-coast hiking and biking trail")
 * American Falls (on Niagara River, in North America)
 * American Falls Dam (in Idaho in the US)
 * American Farm Bureau Federation (AFBF)
 * American Forestry Association (AFA)
 * American Geographical Society (AGS)
 * American Geophysical Union (AGU)
 * American Himalayan Foundation (AHF)
 * American Industrial Hygiene Association (AIHA)
 * American Lung Association (ALA)
 * American Meteor Society (AMS)
 * American Meteorological Society (AMS)
 * American Mink (see paragraphs 2 and 4)
 * American Museum of Natural History (AMNH) (in New York City)
 * American Museum of Science and Energy (AMSE) (in Tennessee in the US)
 * American National Standards Institute Nanotechnology Panel (ANSI-NSP)
 * American Naturalist (monthly scientific journal)
 * American Nuclear Society (ANS)
 * American Ornithologists' Union (AOU)
 * American Petroleum Institute (API)
 * American Society for the Prevention of Cruelty to Animals (ASPCA)
 * American Society of Agricultural and Biological Engineers (ASABE)
 * American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE)
 * American Society of Landscape Architects (ASLA)
 * American Viticultural Area (AVA)
 * American Water Works Association (AWWA)
 * Americans for Balanced Energy Choices (ABEC)
 * (Americanus:2005 Energy Crisis: see) here (?)
 * Ames test (in applied genetics)

Amf-Amz

 * ammonia (toxic) (see under Uses and see under Safety precautions)
 * ammunition
 * ammunition dump (ammunition compound) (ammunition depot) (ammo dump)
 * Amoco Cadiz (supertanker) (involved in an oil spill) (see under Environmental Impact)
 * amoebiasis ("usually contracted by ingesting water or food contaminated by amoebic cysts")
 * amoebic meningitis
 * amphibian (see under Conservation)
 * amphibious aircraft (amphibian aircraft)
 * Amtrak (National Railroad Passenger Corporation) (in the US) (see also list of Amtrak routes)

An-Anh

 * An Essay on the Principle of Population (book)
 * An Inconvenient Truth (documentary film about global warming)
 * anabatic wind (wind moving up a slope)
 * anaerobic digestion (of biodegradable material)
 * anaerobic lagoon ("to dispose of animal waste")
 * anaerobic organism (anaerobe) ("any organism that does not require oxygen for growth")
 * Anahim Volcanic Belt (in British Columbia in Canada)
 * anaphylaxis (see under Causes)
 * anchor
 * anchor handling tug supply vessel (AHTS vessel) (in petroleum industry)
 * anchor portal ("for overhead electrical power transmission lines")
 * anchor pylon (strainer pylon)
 * Ancient Bristlecone Pine Forest (in California in he US)
 * (ancient forest) old growth forest (primary forest) (virgin forest) (primeval forest) (frontier forest)
 * ancient lights (in England in the UK)
 * Ancient Monuments and Archaeological Areas Act 1979 (AMAAA) (in the UK)
 * ancient roads
 * (ancient Roman lighthouses: see) history of lighthouses
 * ancient Roman oil lamp
 * Ancient Woodland (in the UK)
 * Andes (see "earthquakes and volcanic eruptions" in paragraph 1 under Geology and see "trees ... highly endangered" in paragraph 1 under Plant and animal life)
 * ANFO (ammonium nitrate/fuel oil)
 * angling ("a method of fishing") (see under Responsible use of bait fish)
 * Anglo-Persian Oil Company (APOC) (renamed Anglo-Iranian Oil Company [AIOC])

Ani

 * Animal Aid (animal rights organisation) (in the UK)
 * Animal and Plant Health Inspection Service (APHIS) (in the US)
 * (animal charcoal) bone char (bone black) (see under Uses)
 * animal control officer
 * (animal cruelty) cruelty to animals
 * animal echolocation (biosonar) (affected by noise pollution)
 * animal euthanasia
 * Animal Experimentation: Opposing Viewpoints (book)
 * (animal feed) fodder
 * animal hoarding
 * animal husbandry
 * Animal Liberation (book)
 * Animal Liberation Front (ALF)
 * Animal Liberation Front Supporters Group (ALFSG)
 * animal liberation movement (animal rights movement) (animal personhood movement) (animal advocacy movement)
 * Animal Liberation Press Office
 * Animal Planet ("a cable and satellite television network")
 * Animal Planet Canada ("a digital cable specialty channel")
 * animal powered transport
 * Animal Precinct ("a television program on Animal Planet")
 * Animal Protection and Rescue League ( APRL) (in the US)
 * Animal Rescue (television program)
 * Animal Rescue Foundation (ARF) (in California in the US)
 * animal rights (animal liberation) (see also list of animal rights groups)
 * Animal Rights Community Online (ARCO)
 * (animal rights group: see) list of animal welfare groups
 * Animal Rights Militia (ARM)
 * animal sanctuary
 * (animal science) zoology
 * animal shelter (formerly, "pound" or "dog pound")
 * animal testing
 * animal testing on invertebrates
 * animal testing on non-human primates
 * animal testing on rodents
 * animal trapping
 * animal welfare
 * Animal Welfare Act (in various countries)
 * animals of Yellowstone (in the US)

Anj-Ans

 * annual cycle (in geosciences)
 * (annular eclipse: see) solar eclipse (see point 2 under Types and under Partial and annular eclipses)
 * annular hurricane

Ant

 * ant (see under Humans and ants)
 * (ant farm: see) formicarium
 * (Antarctic-Environmental Protocol) Protocol on Environmental Protection to the Antarctic Treaty
 * Antarctic Fur Seal (see under Human interaction)
 * Antarctic ice sheet
 * Antarctic Treaty System (see "Article 5" under Articles of the Antarctic Treaty)
 * antenna (radio)
 * anthracite (blue coal) (hard coal) (stone coal) (blind coal) (Kilkenny coal) (black diamond) (see under Anthracite coal mining today and under Major reserves)
 * anthrax (splenic fever) (an acute infectious disease)
 * (anthrax attacks: see) 2001 anthrax attacks
 * anthrax hoaxes
 * anthrax vaccine
 * (anthropogenic climate change: see) climate change
 * (anthropogenic global warming: see) global warming
 * anthrozoology ("the study of human-animal interaction")
 * anti-aircraft warfare
 * Anti-Ballistic Missile Treaty (ABM Treaty) (ABMT)
 * Anti-Cruelty Society (in Chicago in the US) ("to prevent cruelty to animals")
 * anti-globalization (see "environment" in paragraph 2 of preamble)
 * anti-greenhouse effect
 * anti-personnel weapon
 * anti-submarine warfare (ASW) (A/S)
 * anti-submarine weapon
 * anti-tank dog (dog bomb) (dog mine)
 * anti-tank guided missile (ATGM) (anti-tank guided weapon) (ATGW)
 * antibiotic resistance
 * anticyclone (in meteorology)
 * antifreeze (see "poisonous" in paragraph 1 under Ethylene glycol)
 * (antihistamine: see) H1 antihistamine
 * Antillean Giant Rice Rat (Megalomys desmarestii) (extinct)
 * antimalarial drug
 * antimatter (see under Fuel and under Military)
 * antimatter weapon
 * antimicrobial
 * antimony (chemical element) (see under Sources and under Precautions)
 * antioxidant (see under Uses in technology)
 * antique (related to management of resources and of waste)
 * antiques restoration
 * Antiquities Act of 1906 (in the US) (regarding "park and conservation land")
 * antitoxin
 * antivenin (antivenene) (antivenom)
 * antiviral drug
 * Anton Melik Geographical Institute (in Slovenia)

Ao

 * Aouzou Strip (Aozou Strip) (in Chad) (see "uranium deposits" in paragraph 2)

Ap

 * ape extinction
 * apex predator (alpha predator) (superpredator) (top-level predator) (see under Ecological role)
 * aphotic zone (part of ocean)
 * aphrodisiac (see paragraph 2 of preamble)
 * apiary (bee yard) (important for pollination)
 * (apiculture) beekeeping (important for pollination)
 * aposymbiotic
 * Appalachian Development Highway System (ADHS) (in the eastern US)
 * Appalachian Trail (Appalachian National Scenic Trail) (in the eastern US)
 * Appalachian Trail Conservancy (ATC) (formerly Appalachian Trail Conference)
 * apparent wind
 * apple (see under Pollination and under Pests and diseases)
 * apple maggot (railroad worm) ("pest of several fruits, mainly apples")
 * (apple snail) Ampullariidae (see under A pest)
 * applied ecology
 * (applied genetics: see) genetic engineering (genetic modification) (GM) (gene splicing)
 * appropriate technology
 * April 10-11, 2001 tornado outbreak
 * April 1996 Tornado Outbreak Sequence
 * April 2, 2006 Tornado Outbreak
 * April 6-8, 2006 Tornado Outbreak (see also list of tornadoes in the April 6-8, 2006 Tornado Outbreak)
 * April 9, 1999 Cincinnati, Ohio Tornado

Aq

 * aquaculture (see under Environmental impacts)
 * aquanator ("to generate electricity from water currents")
 * aquanaut
 * (aquaplaning) hydroplaning (tires)
 * aquaponics ("the symbiotic cultivation of plants and aquatic animals in a recirculating environment")
 * aquarium (see also list of aquaria and list of AZA member zoos and aquariums [AZA = Association of Zoos and Aquariums, previously American Zoo and Aquarium Association] and list of CAZA member zoos and aquariums [CAZA = Canadian Association of Zoos and Aquariums] and list of WAZA member zoos and aquariums [WAZA = World Association of Zoos and Aquariums])
 * (aquarium diseases: see) list of aquarium diseases
 * aquascaping
 * aquatic and environmental engineering
 * aquatic communities in the British National Vegetation Classification system
 * (aquatic ecology) hydrobiology
 * aquatic ecosystem
 * aquatic toxicology
 * aqueduct
 * (aqueduct [Roman]: see) Roman aqueduct (see also list of Roman aqueducts by date)
 * aquifer (see under Human dependence on groundwater) (see also list of aquifers)
 * aquifer test (pumping test)
 * Aquifex (a genus of bacteria) ("its method of respiration creates water")
 * Aquificae (phylum of "bacteria that live in harsh environmental settings")

Ar-Arf

 * Arabian Desert
 * Arabian Plate (tectonic plate)
 * arable land
 * arachnid ("Many are venomous") ("some ... are carriers of disease")
 * Aral Sea (in Central Asia) ("shrinking") ("badly polluted")
 * arboretum
 * arboriculture
 * arborist (tree surgeon)
 * arc eye (arc flash) (welder's flash) (corneal flash burns) (flash burns)
 * archaeological ethics
 * archaeological field survey
 * Archaeological Institute of America (AIA)
 * archaeological science
 * archaeological section
 * archaeological site (see also list of archaeological sites sorted by country and list of archaeological sites sorted by continent and age)
 * archaeological sub-disciplines
 * archaeological tourism (archaeotourism)
 * archaeology (archeology) (archæology)
 * archipelago
 * architectural acoustics
 * architectural lighting design
 * architecture
 * Architecture for Humanity (non-profit organization)
 * arcology
 * Arctic (see under Natural resources and under Pollution and under Climate change)
 * Arctic Climate Impact Assessment (ACIA)
 * Arctic National Wildlife Refuge (ANWR) (in Alaska in the US)
 * Arctic Ocean (see under Natural resources and under Natural hazards and under Environmental concerns)
 * Arctic Refuge drilling controversy
 * Arctic Research Office (ARO) (of the US)
 * (Area of Special Scientific Interest: see) Site of Special Scientific Interest (SSSI) (see paragraph 2 under Legal status)
 * area and population of European countries
 * area bombardment
 * area of archaeological potential (in the UK)
 * Area of Critical Environmental Concern (ACEC) (in the US)
 * Area of Outstanding Natural Beauty (AONB) (in the UK)

Arg-Arz

 * Argentine energy crisis (2004)
 * Argo (oceanography) (observation system)
 * Argyle diamond mine (in Australia) ("the largest diamond producer in the world by volume")
 * (Arid Agriculture University: see) University of Arid Agriculture (in Pakistan)
 * Arid Lands Ecology Reserve (in Washington state in the US)
 * arid-zone agriculture
 * (Arizona Biodesign Institute: see) Biodesign Institute (in Arizona in the US)
 * Arkansas Environmental Academy (in the US)
 * Arkansas Fire Academy (in the US)
 * Arkansas Forest Resource Center (in the US)
 * armchair nanotube
 * arms control
 * arroyo (creek) (see "man-made" in paragraph 2)
 * arsenic (see "food chain" under Occurrence and see under Toxicity)
 * arsenic contamination of groundwater
 * arsenic poisoning
 * arson (see "Man-made forest fires" in paragraph 5 of preamble)
 * arterial road (see under Environmental issues)
 * artesian aquifer
 * articulated bus (tandem bus) (bendy bus) (slinky bus) (accordion bus) (jointed bus)
 * artificial cloud
 * artificial dwelling hill
 * artificial flower
 * artificial island (see also list of artificial islands)
 * (artificial lake: see) reservoir
 * artificial leather (American leather cloth)
 * (artificial meat: 2 meanings selected from disambiguation page)
 * in vitro meat (laboratory-grown meat) (cultured meat)
 * meat analogue (meat substitute) (mock meat) (faux meat) (imitation meat) (veat)
 * artificial noise
 * artificial reef
 * (artificial satellite: see) satellite (see under Artificial satellites)
 * artificial ski slopes (dry ski slopes)
 * (artificial snow: see) snow cannon (snowgun) (snow maker) (snow fan)
 * artificial turf (synthetic turf)
 * (artificial waterway) canal (see also list of waterways)
 * artificial wave

As-Asm

 * asbestos (see paragraph 3 of preamble and see under Health issues)
 * asbestos and the law
 * Asbestos, Quebec (in Canada)
 * Asbestos Strike (in 1949) (see "elimination of asbestos dust" in paragraph 1 under Events)
 * Asbestos-Ceramic
 * asbestosis
 * ASEAN Agreement on Transboundary Haze Pollution (signed in 2002)
 * aseptic technique
 * (ash: 2 meanings selected from disambiguation page)
 * fly ash
 * volcanic ash
 * Ash Meadows National Wildlife Refuge (in Nevada in the US) (see "concentration of endemic life" in paragraph 3)
 * Ash Wednesday fires (in 1983) (in Australia)
 * Ash Wednesday Storm of 1962 (on the east coast of the US)
 * (ashcan) waste container (dustbin) (rubbish-bin)
 * Ashfall Fossil Beds (in Nebraska in the US)
 * ashtray
 * Ashy Storm-petrel (seabird) ("endangered")
 * Asia-Pacific Partnership on Clean Development and Climate ("launched on January 12, 2006")
 * Asian brown cloud
 * Asian Elephant (endangered)
 * Asian Highway Network
 * (Asian lady beetle) Harmonia axyridis (multicolored Asian lady beetle) (harlequin lady beetle) (halloween lady beetle) (introduced into the US to control aphids, but now viewed as a nuisance)
 * Asian long-horned beetle (see "An invasive species" in paragraph 3)
 * Asian mussel (pest)
 * Asian tiger mosquito (forest day mosquito) (see under Invasive species)
 * Asiatic Black Bear (threatened)
 * Asmat Swamp (in Indonesia)

Asn-Asz

 * Aspen Fire (in 2003) (in Arizona in the US)
 * asphalt
 * asphalt concrete
 * asphaltene
 * (Associated Landscape Contractors of America: see) Professional Landcare Network (PLANET)
 * Association for the Study of Peak Oil and Gas (ASPO)
 * Association of Zoos and Aquariums (AZA)
 * asthma (see "allergy trigger" in paragraph 4 under Differential diagnosis and see "environmental triggers" under Bronchoconstriction and see "air quality" in paragraph 1 under Causes and see "smoking" and "Automobile emissions" under Treatment)
 * (astrodynamics) orbital mechanics
 * astrometry
 * (astronomical dusk: see) dusk
 * astronomical seeing
 * astronomy
 * astrophotography
 * astrophysics
 * AstroTurf (a brand of artificial turf)
 * Aswan Dam (in Egypt) (see under Environmental and cultural issues and under Irrigation for agriculture)

At-Atl

 * at-grade intersection
 * Athabasca Oil Sands (in Alberta and in Saskatchewan, in Canada)
 * Atlantic cod (threatened)
 * Atlantic Forest (Mata Atlântica) (in Brazil) ("contains a large number of highly endangered species")
 * (Atlantic Gulf Hurricane of 1919) 1919 Florida Keys Hurricane
 * Atlantic herring (see "the most important fish group" under Ecological importance)
 * Atlantic hurricane (see also list of Atlantic hurricanes)
 * Atlantic Multidecadal Oscillation (AMO) (in regard to "sea surface temperature")
 * Atlantic Ocean (see under Natural resources and under Natural hazards and under Current environmental issues)
 * Atlantic Oceanographic and Meteorological Laboratory (AOML) (in the US)
 * (Atlantic Power Outage of 2005) 2005 Atlantic Power Outage
 * (Atlantic Intracoastal Waterway: part of) Intracoastal Waterway (in the US)
 * Atlantic salmon (see under Aquaculture and under Human impact and under under Legislation)
 * atlas ("a collection of maps or manifolds")

Atm

 * atmometer (evaporimeter) ("for measuring the rate of evaporation")
 * atmosphere (see also Earth's atmosphere)
 * atmosphere (unit)
 * Atmospheric Model Intercomparison Project (AMIP)
 * Atmospheric Radiation Measurement (ARM) (in the US)
 * (atmospheric boundary layer) (ABL) planetary boundary layer (PBL) (peplosphere)
 * atmospheric chemistry
 * atmospheric circulation
 * atmospheric dispersion modeling
 * atmospheric diving suit (ADS)
 * atmospheric electricity
 * atmospheric focusing
 * atmospheric icing
 * (atmospheric inversion: see) inversion (meteorology)
 * atmospheric physics
 * atmospheric pressure
 * atmospheric railway
 * atmospheric reentry
 * atmospheric sciences
 * atmospheric stratification
 * atmospheric vacuum breaker (AVB) (see "air contaminants" in paragraph 2)
 * atmospheric window (see under Causes and under Threats)

Atn-Atz

 * atoll ("a type of low, coral island")
 * atolls of the Maldives
 * atomic battery (nuclear battery) (tritium battery) (radioisotope battery)
 * (atomic bomb: see) nuclear weapon
 * atomic bombings of Hiroshima and Nagasaki
 * (atomic cannon: see) nuclear artillery
 * atomic energy (disambiguation page)
 * (Atomic Energy Authority: see) United Kingdom Atomic Energy Authority (UKAEA)
 * (Atomic Energy Commission: see) United States Atomic Energy Commission (AEC)
 * (Atomic Energy Control Board [AECB]: renamed) Canadian Nuclear Safety Commission (CNSC)
 * Atomic Energy of Canada Limited (AECL)
 * Atomic Energy Research Establishment (AERE) (in the UK)
 * (atomic fusion: see) nuclear fusion
 * atomic physics (atom physics)
 * (atomic reactor: see) nuclear reactor technology
 * (atomic testing: see) nuclear testing
 * Atomic Testing Museum (in Nevada in the US)
 * (atomic waste: see) radioactive waste
 * (atomic weapon: see) nuclear weapon
 * Atoms for Peace (speech by Dwight D. Eisenhower)
 * Atoms for Peace Award
 * atopy (atopic syndrome) (see "food, pollen, dander or insect venoms" in paragraph 3)
 * Atriplex (saltbush) (orache) (orach)
 * attribution of recent climate change

Au-Aur

 * Auckland volcanic field (in New Zealand)
 * audience effect ("in subjects ranging from cockroaches to humans")
 * Audubon Nature Institute (based in New Orleans in the US)
 * Audubon Zoo (in New Orleans in the US)
 * (auger drilling: see) drilling rig (see under Auger Drilling)
 * (aura [optics]: see) halo (optical phenomenon) (nimbus) (icebow) (Gloriole)
 * Aura (satellite) ("studying the Earth's ozone, air quality and climate")
 * aurora (astronomy) (including "aurora borealis" ["northern lights"] and "aurora australis" ["southern lights"])
 * auroral kilometric radiation (AKR)

Aus

 * Austin Dam (until 1911 failure, and afterward until 1942 failure) (in Pennsylvania in the US)
 * Australasia ecozone
 * Australasian Antarctic Expedition
 * Australasian Bottled Water Institute (ABWI)
 * Australian Alps (see paragraph 4)
 * Australian Alps montane grasslands
 * Australian Alps Walking Track
 * Australian Atomic Energy Commission (AAEC)
 * Australian Bird Count (ABC)
 * Australian Breastfeeding Association (ABA) (affecting the dairy industry, which affects the environment)
 * Australian Bureau of Agricultural and Resource Economics (ABARE)
 * Australian Cattle Dog (ACD) (Queensland Heeler) (Blue Heeler) (Red Heeler)
 * Australian Coastwatch
 * Australian Conservation Foundation
 * Australian feral camel (see paragraph 6 under: The Camel as a “Workhorse”)
 * Australian Geographic (see "environmental ... projects" in paragraph 3)
 * Australian gold rushes
 * Australian grayling (a freshwater fish) (protected)
 * Australian Journal of Agricultural Research
 * Australian Magpie (see under Swooping)
 * Australian Maritime Safety Authority (AMSA)
 * Australian National Botanic Gardens (ANBG)
 * Australian Nuclear Science and Technology Organisation (ANSTO)
 * Australian Plague Locust Commission (APLC)
 * Australian Quarantine and Inspection Service (AQIS)
 * Australian Speleological Federation Inc.
 * Australian Wildlife Conservancy (AWC)

Aut-Auz

 * auto racing (automobile racing) (motor racing) (car racing)
 * auto rickshaw (see under Fuel efficiency and pollution)
 * (auto-free zone) car-free zone (pedestrianised zone)
 * autobahn (major high-speed road confined to motor vehicles) (in Germany and in Switzerland)
 * autobahns of Switzerland
 * autoignition temperature (kindling point)
 * automated airport weather station
 * Automated Guided Vehicle (Automatic Guided Vehicle) (AGV)
 * automated highway system (AHS) (Smart Road)
 * automated people mover (APM)
 * Automated Transfer Vehicle (ATV) (spacecraft)
 * automatic train operation (ATO)
 * automobile (see under Alternative fuels and batteries and under Safety)
 * automobile emissions control
 * automotive industry
 * automotive lighting
 * automotive navigation system
 * autonomous building
 * autonomous robot
 * autoroute (disambiguation page)
 * Autoroutes du Maroc (ADM)
 * autoroutes of France
 * autoroutes of Quebec
 * Autostrasse (motorroad) (in parts of Europe)
 * autotoxicity
 * autotroph (type of organism)
 * autovent (device for regulating temperature)
 * auxiliary feedwater (in nuclear technology)
 * (auxiliary power: see) emergency power system
 * auxotrophy (in molecular genetics)

Av

 * available water capacity (available water content) (AWC)
 * avalanche
 * avenue (landscape)
 * avian influenza (avian flu) (bird flu)
 * aviary
 * aviation
 * aviation and climate change
 * aviation and the environment
 * Aviation and Transportation Security Act (ATSA) (in the US)
 * Aviation Environment Federation (AEF) (formerly Action Image Exchange) (in the UK)
 * Aviation Environment Federation (AEF) (in the UK)
 * aviation light signals
 * aviation noise
 * (aviation safety: see) air safety
 * Aviation Safety Network (ASN)
 * Aviation Safety Reporting System (ASRS)
 * avicide
 * aviculture
 * Avoiding Dangerous Climate Change: A Scientific Symposium on Stabilisation of Greenhouse Gases (a 2005 international conference)

Aw-Az

 * aye-aye ("an endangered species")