The U.S. Department of Energy funds research, development, and deployment projects to advance the use and adoption of clean, renewable energy technologies.
Solar 
Solar energy technologies promise to improve our air quality, support out economy, and increase energy security.
Wind
Wind energy is a clean, domestic energy source that is competitive with conventional fuel sources.
Biomass
Biomass, such as agriculture and forest residues, energy crops, and algae, fuel bioproducts, biopower, and biofuels.
Geothermal
Tapping the heat within the earth, geothermal energy provides electricity and efficient heating and cooling.
Hydrogen and Fuel Cells
Hydrogen is an energy carrier that can be produced using renewable energy. Fuel cells use hydrogen to produce electricity.