| BASE Technologies | Private Industry |
| Baylor University | Academia |
| Beijing University of Chemical Technology (BUCT) | Academia |
| Belgian Technical Cooperation | Government |
| Berkeley Air Monitoring Group | Independent Consultant |
| Beroya Gospel Fellowship | Non-Governmental Organization |
| Bhorosha Foundation | Academia |
| Bina Energi Mandiri | Non-Governmental Organization |
| Biogas Sector Partnership-Nepal | Non-Governmental Organization |
| BioLite Stove | Private Industry |
| Biomass Energy Foundation (BEF) | Non-Governmental Organization |
| Biomass Energy Resource Center | Non-Governmental Organization |
| Biomass-Stove | Private Industry |
| BIOTEQ KENYA | Private Industry |
| Bolivia Inti - Sud Soleil | Non-Governmental Organization |
| Bosch and Siemens Home Appliances Group | Academia |
| Bright Generation Community Foundation | Non-Governmental Organization |
| Budalangi World Torch | Non-Governmental Organization |
| Buikwe Dairy Development Cooperative Society | Other Organization Type |
| Bunge | Other Organization Type |
| Bureau of Applied Research in Anthropology, University of Arizona | Academia |
| Burn Design Lab | Other Organization Type |
| California Sunlight Corporation | Private Industry |
| Cambodia Fuelwood Saving Project | Non-Governmental Organization |
| Cameroon Gender and Environment Watch (CAMGEW) | Non-Governmental Organization |
| Canada (Government) | Government |
| Capital Enterprise | Other Organization Type |
| CarboCo | Private Industry |
| Carbon Clear | Private Industry |
| CARE International in Rwanda | Non-Governmental Organization |
| CASSPO | Non-Governmental Organization |
| CCB Saeed Khan | Non-Governmental Organization |
| CEDESOL (Centro de Desarrollo con Energía Solar) | Non-Governmental Organization |
| CEFEMAC | Carbon Project Developer |
| Center for Air Resources Engineering and Science at Clarkson University | Academia |
| Center for Integrated Research and Community Development Uganda (CIRCODU) | Non-Governmental Organization |
| CENTER FOR MISSIONARY AND COMMUNITY DEVELOPMENT(CEMCOD) | Non-Governmental Organization |
| Center for Public Health and Environmental Development (CEPHED) | Non-Governmental Organization |
| Center for Renewable Energy and Ecosystem Improvement (CREESI) Cameroon | Non-Governmental Organization |
| Center for Renewable Energy Development | Government |
| Center for Sustainable Energy Technology | Non-Governmental Organization |
| Centers for Disease Control and Prevention | Government |
| Central Philippine University-Approtech Center | Academia |
| Centre d'Etudes et de Recherches sur les Energies Renouvelables (CERER) | Academia |
| Centre for Appropriate Technology (CAT Cameroon) | Non-Governmental Organization |
| Centre for Energy and Environment Technology and Management | Academia |
| Centre for Health and Environment Conservation Nepal (CHEC Nepal) | Non-Governmental Organization |
| Centre for Household Energy and Environment (CEHEEN) | Non-Governmental Organization |
| Centre For Integrated Development | Other Organization Type |
| Centre for Renewable Energy and Appropriate Technologies (CREAT) | Non-Governmental Organization |
