| Abbreviation | Definition |
|---|---|
| CAAEE | Civil Architectural Agricultural and Environmental Engineering |
| CAAR | Community Action Auto Recycling |
| CABEC | Construction & Built Environment Challenge |
| CABI | Centre for Agriculture and Biosciences International |
| CAC | Clean Air Campaign |
| CACEI | Canton Area Citizens for Environmental Issues |
| CAEC | Cellular Adaptation To Environmental Challenge |
| CAED | College of Architecture and Environmental Design |
| CAEE | Colorado Alliance for Environmental Education |
| CAEP | Committee on Aviation Environmental Protection |
| CAER | Centre for Aquaculture Environmental Research |
| CAER | Coalition Against Environmental Racism |
| CAER | Coalition for American Electronics Recycling |
| CAFE | Clean Air For Europe |
| CAFE | Combined Automobile Fleet Emissions |
| CAFR | Colorado Association For Recycling |
| CAIR | Clean Air Interstate Rule |
| CAIRS | Computer-Aided Inspection Reporting System |
| CAM | Compliance Assurance Monitoring |
| CAM | Criteri Ambientari Minimi |