| A&E | architecture and engineering |
| ACR | American Carbon Registry |
| ADM | Archer Daniels Midland |
| AFRI | Agriculture and Food Research Initiative |
| APS | American Physical Society |
| ARPA-E | Advanced Research Projects Agency-Energy |
| ARS | Agricultural Research Service |
| ASU | air separation unit |
| BECCS | bioenergy with carbon capture and sequestration |
| BLM | Bureau of Land Management |
| CAP | Coordinated Agricultural Project |
| CAPEX | capital expenditure |
| CAR | Climate Action Reserve |
| CarbonSAFE | Carbon Storage Assurance Facility Enterprise |
| CAST | Council on Agricultural Science and Technology |
| C-CAP | Coastal Change Analysis Program |
| CCIWG | Carbon Cycle Interagency Working Group |
| CCS | carbon capture and sequestration |
| CCUS | carbon capture, utilization, and storage |
| CDCL | coal direct chemical looping |
| CKD | cement kiln dust |
| CMS | carbon monitoring system |
| CO2 | carbon dioxide |
| CRI | CRI Catalyst Company, Shell Group |
| CRMS | Coastwide Reference Monitoring System |
| CRP | Conservation Reserve Program |
| CSP | Conservation Stewardship Program |
| CWPPRA | Coastal Wetlands Planning, Protection, and Restoration Act |
| DEB | Division of Environmental Biology |
| DOE | Department of Energy |
| DOI | Department of the Interior |
| EIA | Energy Information Administration |
| EJ | exajoule |
| ENSO | El Niño–Southern Oscillation |
| EOR | enhanced oil recovery |
| EPA | Environmental Protection Agency |
| EPRI | Electric Power Research Institute |
| FA | fly ash |
| FE | fossil energy |
| FEMA | Federal Emergency Management Agency |
| FERC | Federal Energy Regulatory Commission |
| FIA | Forest Inventory and Analysis |
| FTE | full-time equivalent |
| GCEP | Global Climate and Energy Project |
| GDP | gross domestic product |
| GeoPRISMS | Geodynamic Processes at Rifting and Subducting Margins |
| GHG | greenhouse gas |
| GRI | Gas Research Institute |
| GTI | Gas Technology Institute |
| ha | hectare |
| IAM | integrated assessment model |
| IECM | integrated environment control model |
| IGCC | integrated gasificaton combined cycle |
| IL-ICCS | Illnois Industrial Carbon Capture and Storage |
| INDC | intended nationally determined contribution |
| InSAR | interferometric synthetic aperture radar |
| IPCC | Intergovernmental Panel on Climate Change |
| ISBL | inside battery limits |
| ITM | Inland Testing Manual |
| JPL | Jet Propulsion Laboratory |
| KIIT | Korea Institute of Industrial Technology |
| LCA | life cycle assessment |
| LCOE | levelized cost of electricity |
| LHV | lower heating value |
| LTER | Long-Term Ecological Research |
| MEA | monoethanolamine |
| Mha | million hectare |
| MHHW | mean higher high water |
| MHHWS | Mean Higher High Water Spring |
| MLW | mean low water |
| MMT | million metric tons |
| MMW | measuring, monitoring, and verification |
| MSL | mean sea level |
| MTG | methanol-to-gas |
| MVA | monitoring, verification, accounting |
| N2O | nitrous oxide |
| NASA | National Aeronautics and Space Administration |
| NASEM | National Academies of Sciences, Engineering, and Medicine |
| NBBF | natural and nature-based features |
| NCPV | National Center for Photovoltaics |
| NEON | National Ecological Observatory Network |
| NEP | net ecosystem productivity |
| NERRA | National Estuarine Research Reserve Association |
| NET | Negative Emissions Technology |
| NETL | National Energy Technology Laboratory |
| NGCC | natural gas combined cycle |
| NGO | nongovernmental organization |
| NIFA | National Institute of Food Agriculture |
| NIST | National Institute of Standards and Technology |
| NOAA | National Oceanic and Atmospheric Administration |
| NPP | net primary production |
| NREL | National Renewable Energy Laboratory |
| NRI | Natural Resource Inventory |
| NSF | National Science Foundation |
| NSF OCE | National Science Foundation Division of Ocean Studies |
| O&M | operations and maintenance |
| OC | organic carbon |
| OTM and ITM | Ocean and Inland Testing Manuals |
| PAF | perturbation atmospheric fraction |
| PNNL | Pacific Northwest National Laboratory |
| ppm | parts per million |
| ppmv | parts per million by volume |
| PSII | photosystem II |
| PV | photovoltaics |
| R&D | research and Development |
| RCP | Representative Concentration Pathway |
| Re | respiration |
| REDD+ | Reduced Deforestation and Forest Degradation Plus |
| RIIHL | Reliance Industrial Investments and Holdings Ltd. |
| ROOTS | Rhizosphere Observations Optimizing Terrestrial Sequestration |
| RSLR | relative sea level rise |
| SCPC | supercritical pulverized coal |
| SCS | soil carbon sequestration |
| SE | standard error |
| SET | surface elevation table |
| SLR | sea-level rise |
| SOCCR-2 | Second State of the Carbon Cycle Report |
| SOM | soil organic matter |
| SubTER | Subsurface Technology and Engineering Research, Development, & Demonstration |
| TRL | technology readiness level |
| TSA | temperature swing adsorption |
| UNEP | United Nations Environment Programme |
| UNFCCC | United Nations Framework Convention on Climate Change |
| USACE | U.S. Army Corps of Engineers |
| USC | ultra-supercritical |
| USDA | U.S. Department of Agriculture |
| USFS | U.S. Forest Service |
| USFWS | U.S. Fish and Wildlife Service |
| USGS | U.S. Geological Survey |
| VCS | Verified Carbon Standard |
| VSA | vacuum swing adsorption |