Environmental health encompasses a broad spectrum of challenges. Historically, the development of sanitation and safe drinking water infrastructure resulted in the dramatic increases in life expectancy and improvements in health in the developed world in the 19th and 20th Century, goals that remain to be realized in developing countries. Among others, challenges to the environmental health practitioner in the 21st Century include assessing and managing health risks in air, water and food ranging from hazardous waste exposure, resistant bacteria resulting from use of antibiotics in raising livestock, radiation waste from nuclear power and other more ubiquitous medical and environmental radiation exposure, newly identified environmental endocrine disruptors that act like hormones in affecting sexual differentiation, neurodevelopment and other outcomes, and the likely massive but still largely unpredictable health impact of climate change. The purpose of the environmental health track is to equip students with skills to critically evaluate and address existing and emerging environmental issues affecting public health. MPH graduates of this track will have knowledge and skills to lead efforts to assess environmental hazards and risks, and to develop and lead intervention efforts in government, not-for-profit, foundation, corporate and academic positions.