Economics Energy economics Energy companies Exxon Mobil Enercon GmbH – Company based in Germany that operates in the wind turbine industry. One of the biggest producers in the world. Saudi Aramco Sasol United States Enrichment Corporation – contracts with the United States Department of Energy to produce enriched uranium. Non-profit organizations Musicians United for Safe Energy Industry associations OPEC – Organization of Petroleum-exporting Countries IEA – International Energy Agency CAPP – Canadian Association of Petroleum Producers World LP Gas Association – WLPGA Innovators Alessandro Volta Charles Kettering Farrington Daniels – solar energy Georges Leclanché – battery John Frederic Daniell – Daniell cell Rudolf Diesel – compression ignition internal combustion engine Georges Imbert – wood gas Leonardo da Vinci Moritz von Jacobi Nicolaus Otto – internal combustion engine Robert Stirling – Stirling engine (external combustion) Nikola Tesla James Watt – steam engine with separate condensor Lists List of books about energy issues List of energy abbreviations List of energy storage projects List of large wind farms List of notable renewable energy organizations List of photovoltaics companies List of renewable energy topics by country List of solar thermal power stations Index of wave articles List of wind turbine manufacturers See also Energy (disambiguation) List of environment topics References External links Energy Energy