Rescission of the Greenhouse Gas Endangerment Finding and Motor Vehicle Greenhouse Gas Emission Standards Under the Clean Air Act

Preamble acronyms and abbreviations. Throughout this document the use of “we,” “us,” or “our” is intended to refer to the EPA. We use multiple acronyms and terms in this preamble. While this list may not be exhaustive, to ease the reading of this preamble and for reference purposes, the EPA defines the following terms and acronyms here:

[deg] C Degree Celsius ABT Averaging, banking, and trading ACC Advanced Clean Cars ACT Advanced Clean Trucks AEO Annual Energy Outlook ANPRM Advanced notice of proposed rulemaking APA Administrative Procedure Act ASTM American Society for Testing and Materials BEV Battery electric vehicle BRICK Building Blocks for Relevant Ice and Climate Knowledge CAA Clean Air Act CAFE Corporate Average Fuel Economy CBI Confidential Business Information CFR Code of Federal Regulations CH4 Methane CI Confidence interval cm Centimeter CO Carbon monoxide CO2 Carbon dioxide CO2e Carbon dioxide equivalent Cong. Rec. Congressional Record CRA Congressional Review Act CWG Climate Working Group CY Calendar year D.C. Circuit U.S. Court of Appeals for the District of Columbia Circuit DHS U.S. Department of Homeland Security DRIA Draft Regulatory Impact Analysis EIA Energy Information Administration EISA Energy Independence and Security Act EPA U.S. Environmental Protection Agency EPCA Energy Policy and Conservation Act of 1975 EV Electric vehicle EVSE Electric vehicle supply equipment E.O. Executive Order FaIR Model Finite amplitude Impulse Response (v2.2.3) climate emulator model FCEV Fuel cell electric vehicles FEL Family emission limit FIP Federal Implementation Plan FR Federal Register GHG Greenhouse gas GMST Global mean surface temperature GSLR Global sea level rise GVWR Gross vehicle weight rating H.R. Rep. House of Representative Report HC Hydrocarbons HD Heavy-duty HDV Heavy-duty vehicle HFC Hydrofluorocarbon ICE Internal-combustion engine ICEV Internal-combustion engine vehicles ICR Information collection request IPCC United Nations Intergovernmental Panel on Climate Change IRA Inflation Reduction Act LD Light-duty LDV Light-duty vehicle MAGICC Model for the Assessment of Greenhouse Gas Induced Climate Change MD Medium-duty MDV Medium-duty vehicle MMT Million metric tons MOVES EPA's MOtor Vehicle Emission Simulator Mt Megatonnes MY Model year N2O Nitrous oxide NAAQS National Ambient Air Quality Standards NAS National Academy of Sciences NASEM National Academies of Sciences, Engineering, and Medicine NCA5 Fifth National Climate Assessment NHTSA National Highway Traffic Safety Administration NMOG + NOX Nonmethane organic gases and oxides of nitrogen NO2 Nitrogen dioxide NOX Oxides of nitrogen NTTAA National Technology Transfer and Advancement Act O3 Ozone OBBB One Big Beautiful Bill Act OBD Onboard diagnostics OMB Office of Management and Budget OMEGA Model Optimization Model for reducing Emissions of GHGs from Automobiles PHEV Plug-in Hybrid Electric Vehicles PFCs Perfluorocarbons PM Particulate Matter PM2.5 Fine particulate matter ppmv Parts per million by volume PRA Paperwork Reduction Act PSD Prevention of Significant Deterioration Pub. L. Public Law RESS Renewable Energy Storage System RFA Regulatory Flexibility Act

RFS Renewable Fuel Standard RIA Regulatory Impact Analysis S. Rep. Senate Report SAB Science Advisory Board SCC Social Cost of Carbon SDWA Safe Drinking Water Act SF6 Sulfur hexafluoride SIP State Implementation Plan SO2 Sulfur dioxide SOx Sulfur oxides SSP2-4.5 Shared socioeconomic pathway 2 with a radiative forcing of 4.5 watts per square meter by 2100 Stat. Statutes at Large U.S. United States U.S.C. U.S. Code UMRA Unfunded Mandates Reform Act USGCRP U.S. Global Change Research Program VOCs Volatile Organic Compounds yr Year