Energy Sources

Learn more about energy from solar, wind, water, geothermal, biomass and nuclear.

Learn more about how we use electricity as an energy source.

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.

Fuel cells use the energy from hydrogen in a highly efficient way -- with only water and heat as byproducts.

Learn more about our fossil energy sources: coal, oil and natural gas.

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

The Office of Energy Efficiency and Renewable Energy (EERE) strengthens U.S. energy security, environmental quality, and economic vitality.

Homepage for the Office of Electricity

The Office of Nuclear Energy advances nuclear power as a resource capable of meeting the nation's energy, environmental, and national security needs.

Homepage for the Office of Fossil Energy and Carbon Management