Department of Energy

Energy Sources

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Clean Energy
Learn more about energy from solar, wind, water, geothermal, biomass and nuclear.
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Fossil
Learn more about our fossil energy sources: coal, oil and natural gas.
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Electric Power
Learn more about how we use electricity as an energy source.
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Energy Storage
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.
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Hydrogen & Fuel Cells
Fuel cells use the energy from hydrogen in a highly efficient way -- with only water and heat as byproducts.
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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.

How Much Energy Do You Consume?

Ever wonder how much energy you consume each year? We're breaking down the numbers for you.

How Much Do You Spend on Energy?
Check out our interactive to calculate how much money you're spending on energy every year.

Offices

Office of Energy Efficiency & Renewable Energy
The Office of Energy Efficiency and Renewable Energy (EERE) strengthens U.S. energy security, environmental quality, and economic vitality.
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Office of Nuclear Energy
The Office of Nuclear Energy advances nuclear power as a resource capable of meeting the Nation's energy, environmental, and national security needs.
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Office of Fossil Energy
Homepage for the Office of Fossil Energy
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Office of Electricity
Homepage for the Office of Electricity
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