Primary energy sources take many forms, including nuclear energy, fossil energy -- like oil, coal and natural gas -- and renewable sources like wind, solar, geothermal and hydropower. These primary sources are converted to electricity, a secondary energy source, which flows through power lines and other transmission infrastructure to your home and business.
Learn more about America’s energy sources: fossil, nuclear, renewables and electricity.
Offices
Office of Energy Efficiency & Renewable Energy
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The Office of Energy Efficiency and Renewable Energy (EERE) strengthens U.S. energy security, environmental quality, and economic vitality.
Office of Nuclear Energy
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The Office of Nuclear Energy advances nuclear power as a resource capable of meeting the Nation's energy, environmental, and national security needs.