Public Health is being impacted by climate change via many pathways – from alterations in infectious disease transmission to water-source compromise, malnutrition, air pollution, and other factors. This talk includes recent analyses that show how mitigating global warming provides extensive health opportunities, as well as major savings in healthcare costs. Jonathan Patz, MD, MPH, is a Professor & John P. Holton Chair in Health and the Environment at the University of Wisconsin-Madison, where he also directs the Global Health Institute.