| AIE | aerosol indirect effect |
| AOD | aerosol optical depth |
| CAA | Clean Air Act |
| CBD | Convention on Biological Diversity |
| CCAC | Climate and Clean Air Coalition to Reduce Short-Lived Climate Pollutants |
| CCN | cloud condensation nuclei |
| CCT | cirrus cloud thinning |
| CDR | carbon dioxide removal |
| CLIVAR | Climate and Ocean—Variability, Predictability, and Change |
| CLRTAP | Convention on Long-Range Transboundary Air Pollution |
| CO2 | carbon dioxide |
| CPT | Climate Process Team |
| CWA | Clean Water Act |
| DECIMALS | Developing Country Impacts Modelling Analysis for Solar Radiation Management |
| DOE | U.S. Department of Energy |
| EIS | environmental impact statement |
| ENMOD | Convention on the Prohibition of Military or Any Other Hostile Use of Environmental Modification Techniques |
| EPA | U.S. Environmental Protection Agency |
| FAA | Federal Aviation Administration |
| FACE | Free-Air CO2 Enrichment |
| FDAAA | Food and Drug Administration Amendments Act |
| FDAMA | Food and Drug Administration Modernization Act |
| FIREX-AQ | Fire Influence on Regional to Global Environments and Air Quality |
| GAO | U.S. Government Accountability Office |
| GeoMIP | Geoengineering Modeling Intercomparison Project |
| GEOSS | Group on Earth Observations |
| GHG | greenhouse gas |
| GLENS | Geoengineering Large Ensemble |
| GT | gigaton |
| IAC | InterAcademy Council |
| IAM | integrated assessment model |
| IAP | InterAcademy Partnership |
| IAP2 | International Association for Public Participation |
| ICH | International Council for Harmonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use |
| ICMJE | International Committee of Medical Journal Editors |
| ICTRP | International Clinical Trials Registry Platform |
| INP | ice nucleating particle |
| IP | intellectual property |
| IPCC | Intergovernmental Panel on Climate Change |
| IR | infrared |
| ISC | International Science Council |
| ISSCR | International Society for Stem Cell Research |
| LBA | Large-Scale Biosphere-Atmosphere Experiment in Amazonia |
| LC/LP | London Convention and London Protocol |
| LES | large eddy simulation |
| MCB | marine cloud brightening |
| MLS | Microwave Limb Sounder |
| MSPES | Multi-Site Public Engagement with Science–Synthetic Biology |
| NASA | National Aeronautics and Space Administration |
| NCAR | National Center for Atmospheric Research |
| NDC | nationally determined contribution |
| NEPA | National Environmental Policy Act |
| NGO | nongovernmental organization |
| NIH | National Institutes of Health |
| NOAA | National Oceanic and Atmospheric Administration |
| NPP | net primary production |
| NSF | National Science Foundation |
| NSTC | National Science and Technology Council |
| ODA | Ocean Dumping Act |
| OECD | Organisation for Economic Cooperation and Development |
| OSTP | Office of Science and Technology Policy |
| POC | pocket of open cells |
| R&D | research and development |
| RCP | Representative Concentration Pathway |
| RF | radiative forcing |
| RRI | responsible research and innovation |
| SAI | stratospheric aerosol injection |
| SCAR | Scientific Committee on Antarctic Research |
| SCoPEx | Stratospheric Controlled Perturbation Experiment |
| SDGs | United Nations Sustainable Development Goals |
| SG | solar geoengineering |
| SPICE | Stratospheric Particle Injection for Climate Engineering |
| SRM | solar radiation management |
| SRMGI | Solar Radiation Management Governance Initiative |
| SSP | Shared Socioeconomic Pathway |
| TRIPS | Trade-Related Aspects of Intellectual Property Rights |
| UN | United Nations |
| UNCLOS | UN Convention on the Law of the Sea |
| UNEA | UN Environment Assembly |
| UNEP | UN Environment Programme |
| UNESCO | UN Educational, Scientific and Cultural Organization |
| UNFCCC | UN Framework Convention on Climate Change |
| USDA | U.S. Department of Agriculture |
| USGCRP | U.S. Global Change Research Program |
| UT | upper troposphere |
| UV | ultraviolet |
| WCRP | World Climate Research Programme |
| WHO | World Health Organization |
| WIPO | World Intellectual Property Organization |
| WMO | World Meteorological Organization |
| WMRA | Weather Modification Reporting Act |
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