John Spengler is the Akira Yamaguchi Professor of Environmental Health and Human Habitation and Director of the Center for Health and the Global Environment at the Harvard T.H. Chan School of Public Health, and Director of the Sustainability and Environmental Management Program at the Harvard Extension School. He has conducted research in the areas of personal monitoring, air pollution health effects, indoor air pollution, and a variety of environmental sustainability issues. Several of his investigations have focused on housing design and its effects on ventilation rates, building materials’ selection, energy consumption, and total environmental quality in homes. Spengler chaired the committee on Harvard Sustainability Principles; he served on Harvard’s Greenhouse Gases Taskforce to develop the University’s carbon reduction goals and strategies; and currently he is a member of Harvard’s Greenhouse Gases Executive Committee. He has served on several National Academies’ committees, including the NRC committee on “Green Schools: Attributes for Health and Learning” (Chair) and the IOM committee on “Effect of Climate Change on Indoor Air Quality and Public Health” (Chair), and has been an advisor to the World Health Organization on indoor air pollution, personal exposure and air pollution epidemiology. In 2003, Spengler received a Heinz Award for the Environment; in 2007, he received the Air & Waste Management Association Lyman Ripperton Environmental Educator Award; and in 2008, he was honored with the Max von Pettenkofer Award for distinguished contributions in indoor air science from the International Society of Indoor Air Quality & Climate’s Academy of Fellows.