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.
Learn more about energy from solar, wind, water, geothermal, biomass and nuclear.
The Energy Department is developing new technologies that will store renewable energy for use when the wind isn't blowing and the sun isn't shining.VIEW MORE
Fuel cells use the energy from hydrogen in a highly efficient way -- with only water and heat as byproducts.VIEW MORE
The Office of Energy Efficiency and Renewable Energy (EERE) strengthens U.S. energy security, environmental quality, and economic vitality.Learn More
The Office of Nuclear Energy advances nuclear power as a resource capable of meeting the nation's energy, environmental, and national security needs.Learn More
Homepage for the Office of Fossil Energy and Carbon ManagementLearn More