Coal is the most-used electricity generation source in 18 states; natural gas in 16

Electricity generators that use fossil fuels continue to be the most common sources of electricity generation in most states. In all but 15 states, coal, natural gas, or petroleum liquids were the most-used electricity generation fuel in 2017. Since 2007, the number of states where coal was the most prevalent electricity generation fuel has fallen as natural gas, nuclear, and hydroelectricity have gained market share. More »