| Abbreviation | Definition |
|---|---|
| CSLF | Carbon Sequestration Leadership Forum |
| CSoVI | Coastal Social Vulnerability Index |
| CSP | Clean Ship Program |
| CSP | Concentrating Solar Power |
| CSRD | Centre for Sustainable Rural Development |
| CSUD | Climate-Sensitive Urban Design |
| CT | Carbon Tax |
| CTC | Canadian Tourism Commission |
| CTC | Credit valley conservation authority |
| CTE | Chronic Toxic Encephalopothy |
| CTEE | Cultural Technological Environmental Exchange |
| CTEIP | Coastal Towns Environmental Infrastructure Project |
| CTR | Cooperative Threat Reduction |
| CTRA | Cooperative Teamwork Recycling Assistance |
| CU | Clean Up |
| CURC | College and University Recycling Coalition |
| CURE | Clean Up the River Environment |
| CURES | Center for Urban Resilience and Environmental Sustainability |
| CURES | Coalition for Urban and Rural Environmental Stewardship |
| CURES | Coalition for Urban Rural Environmental Stewardship |