| ACER | European Union Agency for the Cooperation of Energy Regulators |
| ACTL | Alberta Carbon Trunk Line |
| ANL | Argonne National Laboratory |
| ARI | Advanced Resources International |
| ATR | autothermal reforming |
| AWARE-US | Available Water Remaining for the United States |
| BBL | billion barrels of oil |
| Bcf/d | billion cubic feet per day |
| BECCS | bioenergy with carbon capture and storage |
| C1 | one-carbon chemicals and materials |
| C2 | two-carbon chemicals and materials |
| C2+ | multi-carbon chemicals and materials |
| C2ES | Center for Climate and Energy Solutions |
| CAA | Clean Air Act |
| CATF | Clean Air Task Force |
| CBA | cost-benefit analysis |
| CC | carbon capture |
| CCS | carbon dioxide capture and storage |
| CCU | carbon dioxide capture and utilization |
| CCUS | carbon dioxide capture, utilization, and storage |
| CDR | carbon dioxide removal |
| CEQ | Council on Environmental Quality |
| CO2e | carbon dioxide equivalents |
| CREZ | Competitive Renewable Energy Zone |
| CRI | Carbon Recycling International |
| CSIRO | Commonwealth Scientific and Industrial Research Organization |
| CU | carbon dioxide utilization |
| CUP | conditional use permit |
| CWA | Clean Water Act |
| DAC | direct air capture |
| DDP | Deep Decarbonization Pathways |
| DOC | direct ocean capture |
| DOE | U.S. Department of Energy |
| DOE-BETO | U.S. Department of Energy Bioenergy Technologies Office |
| DOE-EERE | U.S. Department of Energy Office of Energy Efficiency and Renewable Energy |
| DOE-FECM | U.S. Department of Energy Office of Fossil Energy and Carbon Management |
| DOE-HFTO | U.S. Department of Energy Hydrogen and Fuel Cell Technologies Office |
| DOE-NE | U.S. Department of Energy Office of Nuclear Energy |
| DOE-OCED | U.S. Department of Energy Office of Clean Energy Demonstrations |
| DOE-OEID | U.S. Department of Energy Office of Economic Impact and Diversity |
| DOS | U.S. Department of State |
| EASAC | European Academies Science Advisory Council |
| EC | European Commission |
| EEA | European Environment Agency |
| EFI | Energy Futures Initiative |
| EGR | enhanced gas recovery |
| EIA | U.S. Energy Information Administration |
| EIGA | European Industrial Gases Association |
| EIR | environmental impact report |
| EIS | environmental impact statement |
| EOP | Executive Office of the President |
| EOR | enhanced oil recovery |
| EPA | U.S. Environmental Protection Agency |
| ESA | Endangered Species Act |
| EU | European Union |
| FCHEA | Fuel Cell and Hydrogen Energy Association |
| FEED | front-end engineering design |
| FERC | Federal Energy Regulatory Commission |
| FTS | Fischer-Tropsch synthesis |
| GHG | greenhouse gas |
| Gt | gigatonne |
| GW | gigawatt |
| GWP | global warming potential |
| H2S | hydrogen sulfide |
| HGL | hydrocarbon gas liquid |
| IDEALHy | Integrated Design for Efficient Advanced Liquefaction of Hydrogen |
| IEA | International Energy Agency |
| IEAGHG | IEA Greenhouse Gas R&D Programme |
| IIJA | Infrastructure Investment and Jobs Act |
| IPCC | Intergovernmental Panel on Climate Change |
| IRA | Inflation Reduction Act |
| IRENA | International Renewable Energy Agency |
| ITIF | Information Technology & Innovation Foundation |
| IWG | International Working Group |
| kWh | kilowatt hour |
| LADWP | Los Angeles Department of Water and Power |
| LBNL | Lawrence Berkeley National Laboratory |
| LCA | life cycle assessment |
| LEP | Labor Energy Partnership |
| LNG | liquefied natural gas |
| LPG | liquefied petroleum gas |
| MCC | Mercator Research Institute on Global Commons and Climate Change |
| MEA | monoethanolamine |
| MMT | million metric tons, million tonnes, megatonnes |
| MP | methane pyrolysis |
| Mtpa | million tonnes per annum |
| MWhe | megawatt-hours of electricity |
| NEPA | National Environmental Policy Act |
| NETL | National Energy Technology Laboratory |
| NGA | Natural Gas Act |
| NJDEP | New Jersey Department of Environmental Protection |
| NOx | nitrogen oxides |
| NPC | National Petroleum Council |
| NPDES | National Pollutant Discharge Elimination System |
| NPMS | National Pipeline Mapping System |
| NSR | New Source Review |
| PARC | Palo Alto Research Center |
| PEM | proton exchange membrane |
| PHMSA | Pipeline and Hazardous Materials Safety Administration |
| POx | partial oxidation |
| PPA | power purchase agreement |
| PSD | Prevention of Significant Deterioration |
| PTC | production tax credit |
| PV | photovoltaic |
| R&D | research and development |
| RD&D | research, development, and demonstration |
| REPEAT | Rapid Energy Policy Evaluation and Analysis Toolkit |
| SMR | steam methane reforming |
| SOx | sulfur oxides |
| TEA | techno-economic assessment |
| TRL | technology readiness level |
| TWh | terawatt hour |
| WE | water electrolysis |
| WTI | West Texas Intermediate crude oil |
| UNFCCC | United Nations Framework Convention on Climate Change |
| USACE | U.S. Army Corps of Engineers |
| USCA | United States Climate Alliance |
| USD | U.S. dollar |
| USFWS | U.S. Fish & Wildlife Service |
| ZEP | Zero Emissions Platform |