The Collaborative for Health and Environment (CHE) is an international partnership, founded in 2002 at Commonweal, committed to strengthening the scientific and public dialogue on environmental factors linked to chronic disease and disability. CHE acts as a catalyst for civil discourse and collaborative initiatives among researchers, health professionals, health-affected groups and others concerned with social and environmental impacts on human health. Through these relationships, CHE fosters systemic, multi-factorial, prevention-oriented actions in order to improve human health across the lifespan. CHE’s partners include almost 5,000 individuals and organizations in 79 countries and all 50 states.