In its “Annual Energy Outlook 2021,” (AEO2021), the US Energy Information Administration (EIA) projects that the share of renewables in the US electricity generation mix will increase from 21% in 2020 to 42% in 2050. Wind and solar generation are responsible for most of that growth. The renewable share is projected to increase as nuclear and coal-fired generation decrease and the natural gas-fired generation share remains relatively constant. By 2030, renewables will collectively surpass natural gas to be the predominant source of generation in the United States. Solar electric generation (which includes photovoltaic (PV) and thermal technologies and both small-scale and utility-scale installations) will surpass wind energy by 2040 as the largest source of renewable generation in the United States. The AEO2021 Reference case projects that the natural gas share of the U.S. electricity generation mix will remain at about one-third of total generation from 2020 to 2050.