Three fossil fuels—petroleum, natural gas, and coal—have provided more than 80% of total U.S. energy consumption for more than 100 years.
In 2015, fossil fuels made up 81.5% of total U.S. energy consumption, the lowest fossil fuel share in the past
The most significant decline in recent years has been coal: U.S. coal consumption fell 13% in 2015, the highest annual percentage decrease of any fossil fuel in the past 50 years.