evidence: Although coal-fired power plants have no mandatory retirement age, power plant owners and operators have reported to EIA that they plan to retire 28%, or 59 gigawatts (GW), of the coal-fired capacity currently operating in the United States by 2035. As of September 2021, 212 GW of utility-scale coal-fired electric-generating capacity was operating in the United States, most of which was built in the 1970s and 1980s, according to our Preliminary Monthly Electric Generator Inventory. [...] Coal-fired plants in particular have been identified as a large source of CO2 emissions. As a result, many states with clean energy standards have required a reduction or complete phase-out of coal-fired generation, even though some units may still be economically viable. As a result of continued pressure on coal generation to reduce CO2 emissions, the number of coal plants planning to retire between now and 2035 is likely to increase. As of September 2021, developers have not reported plans to install any new utility-scale coal-fired power plants in the United States, according to our Preliminary Monthly Electric Generator Inventory.