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- AAA batteryThe AAA battery (or triple-A battery) is a standard size of dry cell battery. One or more
- Abiogenic petroleum originFringe theory about the origin of petroleum
- Abuja Thermal Power StationNigerian power station
- AC power plugs and socketsConnector used to connect to mains power
- AC-to-AC converterDevice converting an AC waveform to another AC waveform
- Accumulator (energy)Energy storage device
- Adani GroupIndian multinational conglomerate
- Adétikopé Solar Power StationSolar farm in Togo
- Advanced boiling water reactorThe advanced boiling water reactor (ABWR) is a Generation III boiling water reactor. The A
- Advanced CANDU reactorCanadian third generation nuclear reactor design
- Advanced gas-cooled reactorType of British nuclear reactor
- Aegean Sea tanker oil spill1992 environmental disaster off the coast of Galicia, Spain
- Age of OilEra in history
- AggrekoSupplier of temporary power generation
- AGL EnergyAustralian electricity generator and retailer
- Agua Caliente Solar ProjectPhotovoltaic power station in Arizona, United States
- Aguçadoura test siteThe Aguçadoura test site is an offshore location in the north of Portugal where grid conne
- Aguçadoura Wave FarmWave power station in Portugal
- Aimata DamDam in Gunma Prefecture, Japan
- Ajaokuta–Kaduna–Kano Natural Gas PipelineNigerian natural gas pipeline
- Akademik LomonosovRussian floating nuclear power plant
- Al Shaheen Oil FieldThe Al Shaheen Oil Field is a production oil and gas field off the north east coast of Qat
- Al Zour RefineryCrude oil refinery of Kuwait
- Al-Omar fieldOil field in Syria
- Alameda Municipal PowerMunicipal electric utility in Alameda, California
- Alaska gas pipelineProposed natural gas pipeline
- Alaska InterconnectionAmerican AC power transmission grid
- Alberta Clipper pipelineOil pipeline through Canada and the U.S.
- Albertine Graben Refinery ConsortiumRefinery Consortium in Uganda
- Alcohol fuelAlcohols used as fuel for internal combustion engines
- Algae fuelUse of algae as a source of energy-rich oils
- Alholmens Kraft Power StationBiomass power station in Ostrobothnia, Finland
- Alkaline batteryType of electrical cell
- All-Russian Scientific Research Institute of Experimental PhysicsResearch institute based in Sarov, Russia
- Allegheny GroupPennsylvanian-age geological unit
- Alma Station (power station)Power station in Wisconsin, United States
- Altai gas pipelineProposed natural gas pipeline between Russia and China
- Alternative fuelFuels from sources other than fossil fuels
- AlternatorDevice converting mechanical into electrical energy
- AltlußheimAltlußheim is a municipality in Baden-Württemberg and belongs to Rhein-Neckar-Kreis.
- Aluminum building wiringType of electrical wiring
- AMBO pipelineBulgaria-Albania gas transporter
- American Gas AssociationThe American Gas Association (AGA) is an American trade organization founded in 1918 repre
- American Petroleum InstituteOil and natural gas trade association
- American Wind Energy AssociationThe American Wind Energy Association (AWEA) was a Washington, D.C.–based national trade as
- AmocoAmerican fuel station chain owned by BP
- Amory LovinsAmerican energy policy analyst
- ÅmøyÅmøy is an island in Stavanger Municipality in Rogaland county, Norway. The 5.3-square-kil
- Andasol solar power stationConcentrated solar thermal power station in Spain
- Anti-nuclear movement in GermanyThe anti-nuclear movement in Germany has a long history dating back to the early 1970s whe
- Anti-nuclear movement in South KoreaThe anti-nuclear movement in South Korea consists of environmental groups, religious group
- Anti-nuclear movement in SpainThe late 1950s and early 1960s saw a strong push from the Spanish Government to establish
- Anti-nuclear movement in SwitzerlandIn 2008, nuclear energy provided Switzerland with 40 percent of its electricity, but a sur
- Anti-nuclear movement in the PhilippinesThe anti-nuclear movement in the Philippines aimed to stop the construction of nuclear pow
- Anti-nuclear movement in the United KingdomGroups in the United Kingdom that oppose nuclear power and nuclear weapons
- Anti-nuclear movement in the United StatesMovement opposing the use of nuclear power, weapons, and/or uranium mining
- Anti-nuclear protestsProtests in opposition of nuclear power or nuclear weapons
- Anti-nuclear protests in the United StatesProtests against nuclear power and weapons in the United States
- Anti–nuclear power movement in JapanLong one of the world's most committed promoters of civilian nuclear power, Japan's nuclea
- API gravityMeasure of how heavy or light a petroleum liquid is compared to water
- APR-1400South Korean advanced pressurized water nuclear reactor
- APX GroupEnergy exchange
- Arc-fault circuit interrupterCircuit breaker that protects against intermittent faults associated with arcing
- ArcologyType of design principles for human habitats
- Arctic LNG 2Project in the Gydan Peninsula, Russia
- Arctic Refuge drilling controversyQuestion of whether to drill for oil in the Arctic National Wildlife Refuge
- Ardrossan Wind FarmThe 24 megawatt (MW) Ardrossan Wind Farm in Ardrossan, North Ayrshire, Scotland was offici
- Area code 724Area code 724 is a telephone area code in the North American Numbering Plan for the Common
- ArevaDefunct French nuclear and renewable energy provider
- Argand lampThe Argand lamp is a type of oil lamp invented in 1780 by Aimé Argand. Its output is 6 to
- Arjun MakhijaniArjun Makhijani is a nuclear engineer who is president of the anti-nuclear organization, t
- Arklow Bank Wind ParkWind farm off the Wicklow coast, Ireland
- Armoured cableElectric power cable protected by a layer of steel wires
- Arrochar AlpsThe Arrochar Alps are a group of mountains located around the heads of Loch Long, Loch Fyn
- Arthur H. RosenfeldAmerican physicist
- Ascent SolarAscent Solar Technologies, Inc. is a publicly traded photovoltaic (PV) company located in
- ASHRAEAmerican HVAC professional association
- Athabasca oil sandsOil and bitumen deposits in Alberta, Canada
- Atlantis PQOil platform
- Atomic batteryDevices generating electricity from radioisotope decay
- Atomic Safety and Licensing BoardThe Atomic Safety and Licensing Board Panel (ASLBP) is an independent adjudicatory divisio
- Atucha Nuclear Power PlantThe Atucha Nuclear Complex, or Atucha Nuclear Power Plant, is the location for two adjacen
- Automatic generation controlSystem adjusting the output of electric generators
- Automatic meter readingAutomatic meter reading (AMR) is the technology of automatically collecting consumption, d
- Availability factorMeasure of power plant productivity
- Avedøre Power StationPower station in Denmark
- Aviation fuelFuel used to power aircraft
- Awe Hydro-Electric SchemePower stations near Loch Awe, Scotland
- Azeri oilfieldAzeri (Azerbaijani: Azəri) is an offshore oil field in the Caspian Sea, located 100 km (62
- Azeri–Chirag–GunashliComplex of oil fields in the Caspian Sea