| C-GLOPS: Copernicus Global Land Cover maps at a 100m resolution |
| CAMALIOT |
| Citizen Science for Landslide Risk Reduction and Disaster Resilience Building in Mountain Regions (Landslide EVO) |
| Clean Air Strategies for Europe |
| Climate change induced waterstress: challenges and opportunities in Austrian regions (WaterStressAT) |
| Climate mitigation through achieving biodiversity targets |
| Climate resilient policy-led bioeconomy pathways (BIOCLIMAPATHS) |
| CO-designing the Assessment of Climate CHange Costs (COACCH) |
| CO-development of Methods to utilize uncertain multi-model based Information on freshwater-related hazards of Climate Change (CO-MICC) |
| Co-Inform |
| Collecting in-situ Data for Earth Observation Product Validation via Social Games (LandSpotting) |
| CONSTRAIN |
| Crowdsourcing for post-disaster damage mapping |
| CrowdVal |
| Cutting Greenhouse Gases in Europe |