John D. Spengler, PhD is the Akira Yamaguchi Professor of Environmental Health and Human Habitation in the Department of Environmental Health at Harvard University’s School of Public Health. He is the Director of the Sustainability and Environmental Management Program for Harvard Extension School (http://www.extension.harvard.edu/degrees-certificates/sustainability-environmental-management ) and the Center for Health and the Global Environment at Harvard School of Public Health. He has conducted research in the areas of personal monitoring, air pollution health effects, aerosol characterization, and indoor air. More recently, Dr. Spengler has been involved in research that includes the integration of knowledge about indoor and outdoor air pollution as well as other risk factors into the design of housing, buildings, and communities. He uses the tools of life-cycle analysis, risk assessment, and activity-based costing as indicators to measure the sustainable attributes of alternative designs, practices, and community development. Dr. Spengler has served as an adviser to the World Health Organization on indoor air pollution, personal exposure, and air pollution epidemiology. In 2003, Dr. Spengler was recipient of the Heinz Award for the Environment; in 2008, he was honored by the International Society of Indoor Air Quality and Climate’s Academy of Fellows with the Max von Pettenkofer award for distinguished contributions to the field of indoor air science. He received a BS in physics from the University of Notre Dame, an MS in environmental health sciences from Harvard University, and a PhD in atmospheric sciences from the State University of New York-Albany.