On February 3, 2021, the U.S. Energy Information Administration (EIA) released the 2021 Annual Energy Outlook (AEO). AEO 2021 contains projections of energy use from the electric power, residential, commercial, industrial, and transportation sectors through 2050. AEO 2021’s Reference case is a projection of the future based on estimates of fuel availability, changes in technology costs, and current legislation.