John D. Spengler, Director, Center for Health and the Global Environment and Yamaguchi Professor of Environmental Health and Human Habitation, Harvard School of Public Health; Joseph Allen, Program Leader, Healthy Buildings, Center for Health and the Global Environment and Assistant Professor of Exposure Assessment Science, Harvard School of Public Health; and Julia Africa, Program Leader, Nature, Health, & the Built Environment, Harvard School of Public Health, will lead a discussion on “How Does the Environment Affect Our Health?"