Gary is a co-founder and president of Health Care Without Harm, the international campaign for environmentally responsible healthcare. HCWH is working to prevent disease and illness in society by assisting the healthcare sector to understand the links between a healthy environment and healthy people and helping hospitals become more environmentally sustainable as well as anchors in their communities for resilience, equity and community wellness. He is president of Practice Greenhealth, a U.S. membership affiliate of HCWH with over 1300 hospital members. He is also the co-founder of Greenhealth Exchange, a sustainable purchasing cooperative in the U.S. healthcare sector. Gary is a member of the International Advisory Board of the Sambhavna Clinic in Bhopal, India, which provides free medical care to the survivors of the Union Carbide gas disaster in Bhopal. Gary was awarded the MacArthur “Genius:” award in 2015, and the Champion for Change for Climate Change and Public Health by the White House in 2013. He was also awarded the Skoll Global Award for Social Entrepreneurship in 2006 and the Frank Hatch Award for Enlightened Public Service Award in 2007.