Fossil fuel sources accounted for 79% of U.S. consumption of primary energy in 2021

Fossil fuels—petroleum, natural gas, and coal—accounted for 79% of the 97 quadrillion British thermal units (quads) of primary energy consumption in the United States during 2021. About 21% of U.S. primary energy consumption in 2021 came from fuel sources other than fossil fuels, such as renewables and nuclear, according to data in our Monthly Energy Review.