The amount of electric power produced from coal has been steadily declining in the United States over the past 10 years, falling to a 46-year low of 773,393 gigawatthours (GWh) in 2020. Although U.S. coal-fired generation increased by 16% to 898,679 GWh in 2021, we forecast a continued move away from coal. To be more competitive in the electric power market, some coal-fired plants are adding natural gas-fired generation to their coal-fired capacity (a fuel-flexible plant).