Our Clients Centers for Disease Control and Prevention U.S. Environmental Protection Agency U.S. Department of Energy Clean Cooking Alliance Winrock International Burn Manufacturing Shell Foundation Gold Standard WASHplus Envirofit Posner Research Group, University of Washington Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) Portland State University Public Health Institute The Paradigm Project Impact Carbon Toyola Energy DelAgua FHI 360 PATH Agence Française de Developpement University Research CO., LLC African Development Bank The Nature Conservancy World Bank Group Practical Action Project Gaia Ugastove USAID WHO