| Abbreviation | Definition |
|---|---|
| CASBEE | Comprehensive Assessment System for Built Environment Efficiency |
| CATEX | Categorical Exclusion |
| CBCRA | Canadian Beverage Container Recycling Association |
| CBD | Conservation of Biological Diversity |
| CBEE | China Beijing Environmental Exchange |
| CBEP | Community Based Environmental Protection |
| CBR | Center for Bioenvironmental Research |
| CCA | Chromated Copper Arsenate |
| CCA | Common Cabin Air |
| CCA | Community Conserved Area |
| CCAA | California Clean Air Act |
| CCAD | Canadian Conservation Areas Database |
| CCAEC | Canada Chile Agreement for Environmental Cooperation |
| CCAEC | Canada Chile Agreement on Environmental Cooperation |
| CCAMLR | Commission for Conservation of Antarctic Marine Living Resources |
| CCAN | Chesapeake Climate Action Network |
| CCAN | Citizen's Committee on Airport Noise |
| CCAT | Climate Change Action Team |
| CCC | California Conservation Corps |
| CCCA | Catfish Creek Conservation Authority [Ontario, Canada] |