John Spengler, Akira Yamaguchi Professor of Environmental Health and Human Habitation, and Director of the JPB Environmental Health Fellowship Program at the Harvard T.H. Chan School of Public Health, has conducted research on 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; and served on Harvard’s Greenhouse Gases Taskforce to develop the University’s carbon reduction goals and strategies, as well as Harvard’s Greenhouse Gases Executive Committee. He serves on the National Academies’ Health and Medicine Division “Roundtable on Environmental Health Sciences, Research and Medicine”. Previously he chaired the National Academies’ NRC “Green Schools: Attributes for Health and Learning” committee and the IOM “Effect of Climate Change on Indoor Air Quality and Public Health” committee; and he has served as an advisor to the World Health Organization on indoor air pollution, personal exposure and air pollution epidemiology. He now serves on the Alfred P. Sloan Foundation’s Chemistry of Indoor Environments advisory committee. In 2003, Spengler received a Heinz Award for the Environment; in 2007, the Air & Waste Management Association Lyman Ripperton Environmental Educator Award; in 2008, 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; and in 2015, the ASHRAE Environmental Health Award.