| AGAGE | Advanced Global Atmospheric Gases Experiment |
| AMB | aircraft mass balance |
| ARS | Agricultural Research Service |
| CAIT | Climate Analysis Indicators Tool |
| CALMIM | CAlifornia Landfill Methane Inventory Model |
| CARB | California Air Resources Board |
| CI | confidence interval |
| CL | confidence level |
| CMB | chemical mass balance |
| COBRA-NA | CO2 Boundary Layer Regional Airborne–North America |
| CSIRO | Commonwealth Scientific and Industrial Research Organization, Australia |
| DE | digestible energy |
| DiAL | differential absorption Lidar |
| DMI | dry matter intake |
| DOE | U.S. Department of Energy |
| EDGAR | Emissions Database for Global Atmospheric Research |
| EF | emission factor |
| EIA | Energy Information Administration |
| EPA | U.S. Environmental Protection Agency |
| EREF | Environmental Research and Education Foundation |
| ESRL | Earth System Research Laboratory |
| FOD | first-order decay model |
| FTIR | Fourier-transform infrared |
| G&B | gathering and boosting |
| GAINS | Greenhouse gas and Air pollutant Interactions and Synergies |
| GCP | Global Carbon Project |
| GEI | gross energy intake |
| GeoCARB | Geostationary Carbon Cycle Observatory |
| GF | GreenFeed® |
| GGRN | Global Greenhouse Gas Reference Network |
| GHG | greenhouse gas |
| GHGI | U.S. Greenhouse Gas Inventory |
| GHGRP | Greenhouse Gas Reporting Program |
| GOSAT | Greenhouse Gases Observing Satellite |
| GRACEnet | Greenhouse gas Reduction through Agricultural Carbon Enhancement network |
| GRI | Gas Research Institute |
| GWP | global warming potential |
| HB | high bleed |
| IB | intermittent bleed |
| IEA | International Energy Agency |
| InGOS | Integrated Non-CO2 Greenhouse gas Observing System |
| INSTAAR | Institute of Arctic and Alpine Research |
| IPCC | Intergovernmental Panel on Climate Change |
| LB | low bleed |
| LCA | life-cycle analysis |
| LMOP | Landfill Methane Outreach Program |
| LULUCF | land use, land use change, and forestry |
| MCF | methane conversion factor |
| MSHA | U.S. Mine Safety and Health Administration |
| NASA | National Aeronautics and Space Administration |
| NASS | National Agricultural Statistics Service |
| NGOs | nongovernmental organizations |
| NGPL | natural gas plant liquid |
| NGPP | natural gas power plant |
| NOAA | National Oceanic and Atmospheric Administration |
| NSF | National Science Foundation |
| OECD | Organisation for Economic Co-operation and Development |
| OSSE | observation system simulation experiments |
| OTM | other test method |
| PTW | pump-to-wheels |
| SCIAMACHY | Scanning Imaging Absorption Spectrometer for Atmospheric Chartography |
| SIT | State Inventory Tool |
| STEWARDS | Sustaining the Earth’s Watersheds, Agricultural Research Data System |
| TANSO-FTS | Thermal and Near Infrared Sensor for Carbon Observation |
| TCA | tracer correlation approach |
| TCCON | Total Carbon Column Observing Network |
| TROPOMI | TROPOspheric Monitoring Instrument |
| UN | United Nations |
| UNFCCC | United Nations Framework Convention on Climate Change |
| USDA | U.S. Department of Agriculture |
| VOCs | volatile organic compounds |
| VRPM | vertical radial plume mapping |
| VS | volatile solids |
| WDCGG | World Data Centre for Greenhouse Gases |
| WIP | waste in place |
| WRF-STILT | Weather Research and Forecasting—Stochastic Time-Inverted Lagrangian Transport |
| WRI | World Resources Institute |
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