Resource: Professional Societies
- British Ecological Society
- British Science Association
- British Society of Underwater Photographers
- Brown Girls Doc Mafia
- Bullard Center for Environmental and Climate Justice
- Bureau of Ocean Energy Management
- California Aquaculture Association
- California Botanical Society
- California Chaparral Institute
- California Native Plant Society
- California Natural Resources Agency
- California Ocean Science Trust
- Canadian Authors Association
- Canadian Healthy Oceans Network
- Canadian Integrated Multi-Trophic Aquaculture Network
- Canadian Ocean Awareness Student Network
- Canadian Society of Microbiologists
- CantoMundo
- Caribbean Climate Justice Alliance
- Center for Biological Diversity
- Center for Climate and Energy Solutions
- Center for Diversity and the Environment
- Center for Effective Global Action
- Center for Indigenous Research, Science, and Technology
- Center for Indigenous Science
- Center for International Environmental Law
- Center for Marine Biodiversity and Conservation
- Center for Marine Biotechnology and Biomedicine
- Center for Maritime Archaeology and Conservation
- Center for Minorities in Science and Engineering
- Center for Native Peoples and the Environment
- Center for Public Integrity
- Center for Responsible Travel
- Center for Rural Enterprise and Environmental Justice
- Center for Sustainable Energy
- Center for Sustainable Tourism
- Center for the Study of Women in Television and Film
- Center for Tropical and Subtropical Aquaculture
- Center For Western Weather and Water Extremes
- Center on Global Energy Policy at Columbia
- Center on Race, Poverty & the Environment
- Central Caribbean Marine Institute
- Centre for Life's Origins and Evolution
- Cetacean Society International
- Challenger Society for Marine Science
- Chasing Coral
- Chelonian Research Foundation
- Chicago Film Society
- Children's Book Council
- Cinefemme