°C Degrees Celsius AEO Annual Energy Outlook ANL Argonne National Laboratory Bcf, BCF Billion cubic feet Bcf/d Billion cubic feet per day BECCS Bioenergy with carbon capture and storage BIL Bipartisan Infrastructure Law Btu British thermal unit CAFE Corporate Average Fuel Economy Standards CCS Carbon capture and storage CCUS Carbon capture, utilization, and storage CDR Carbon dioxide removal CF 4 Tetrafluoromethane CH 4 Methane CO 2 Carbon dioxide CO 2 e Carbon dioxide equivalent DAC Direct air capture DOE Department of Energy EIA Energy Information Administration EPA Environmental Protection Agency EJ Exajoule (10 18 joules) FECM Office of Fossil Energy and Carbon Management FID Final Investment Decision GCAM Global Change Analysis Model GDP Gross domestic product GHG Greenhouse gas Gt Gigaton