| Term | Definition / Meaning / Stand for |
| ABC |
Atmospheric Brown Cloud |
| ACID |
Anthropogenic Chemical Impacts Database |
| ACP |
Atmospheric Chemistry Program |
| AES |
Agricultural Environmental Services |
| AHM |
Arctic Haze Monitoring |
| AIME |
American Institute of Mining, Metallurgical, and Petroleum Engineers |
| ANWR |
Arctic National Wildlife Refuge |
| ARCC |
Atmospheric Research Collaboration Center |
| ASBS |
Areas of Special Biological Significance |
| ASC |
Atmospheric Science Center |
| ASP |
Alternative Sustainable Practices |
| ASWS |
Advanced Storm Water Systems |
| ATD |
Advanced Technology Development (in clean energy) |
| AUS |
Agricultural Usage Standards |
| AWG |
Anthropogenic Warming Gas |
| BAP |
Best Available Practices |
| BBA |
Biosphere Benefit Assessment |
| BCA |
Benefit-Cost Analysis |
| BCSD |
Business Council for Sustainable Development |
| BEE |
Bureau of Energy Efficiency |
| BEM |
Built Environment Modeling |
| BEP |
Best Environmental Practice |
| BGS |
British Geological Survey |
| BHC |
Basic Hazard Criteria |
| BIP |
Biodiversity Implementation Plan |
| BLC |
Blue Carbon (carbon stored in coastal and marine ecosystems) |
| BLP |
Best Landscape Practices |
| BLR |
Biogeochemical Landscape Research |
| BMP |
Best Management Practices |
| BOEM |
Bureau of Ocean Energy Management |
| BP |
Bio-Pesticides |
| BPA |
Bonneville Power Administration |
| BRD |
Biodegradable Resource Development |
| BREA |
Best Renewable Energy Available |
| BRI |
Building Resilience Index |
| BRI |
Biodiversity Research Institute |
| CCD |
Climate Change Division |
| CCD |
Convention to Combat Desertification |
| CDID |
Consolidated Diking Improvement District |
| CERCLA |
Comprehensive Environmental Response, Compensation, and Liability Act |
| CERM |
Civil Engineering Reference Manual |
| CGE |
Consultative Group of Experts |
| CIRIA |
Construction Industry Research and Information Association |
| CITES |
Convention on International Trade in Endangered Species |
| CLP |
Conservation Leadership Programme |
| CMA |
Climate Mitigation Action |
| CMIP6 |
Coupled Model Intercomparison Project Phase 6 |
| CMSP |
Coastal and Marine Spatial Planning |
| CPLX |
Complexity |
| CRES |
Centre for Renewable and Sustainable Energy |
| CRG |
Conservation Research Group |
| CSO |
Civil Society Organization |
| CWR |
Crop Wild Relatives |
| CZMA |
Coastal Zone Management Act |
| DAC |
Development Assistance Committee |
| DBCP |
Disaster-Based Cost Prediction |
| DCIA |
Directly Connected Impervious Area |
| DDP |
Disaster Development Program |
| DDT |
Dichlorodiphenyltrichloroethane |
| DEAP |
Data Envelopment Analysis Program |
| DEMO |
Demonstration Project |
| DES |
Decision Support System |
| DICE |
Dynamic Integrated Climate-Economy Model |
| DMCC |
Disaster Mitigation and Coordination Center |
| DNRP |
Department of Natural Resources and Parks |
| DWR |
Deep Water Recharge |
| EB |
Ecological Balance |
| ECA |
Environmental Compliance Audit |
| ECE |
Economic Commission for Europe (UN) |
| EDF |
Environmental Defense Fund |