Energy, Government, and Defense magazines
- Chemical Spills
- Chernobyl Disaster Spurs Ecological Movements in Eastern Europe
- China: Climate and Energy Policies
- China: Total Carbon Dioxide Emissions
- Chlorofluorocarbons and Related Compounds
- CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora)
- Clean Air Act of 1970
- Clean Air Mercury Rule of 2005
- Clean Development Mechanism
- Clean Development Mechanism
- Clean Energy
- Clear–cutting
- Climate Change Impacts on the United States
- Climate Change Science Program
- Climate Change Skeptics
- Climate Engineering
- Climate Lag
- Climate Modeling
- Closed Ecology Experiments
- Clouds and Reflectance