John Daniel Spengler is an American health scholar currently serving as the Akira Yamaguchi Professor of Environmental Health and Human Habitation at Harvard T. H. Chan School of Public Health and a faculty member in the Harvard Department of Environmental Science and Public Policy and Harvard Faculty of Arts and Sciences.
[4][5] Spengler has conducted research personal monitoring, the health effects of air and other environmental pollution, indoor air pollution, and other environmental sustainability issues.
He chaired the committee on Harvard Sustainability Principles, served on Harvard's Greenhouse Gases Taskforce to develop the university's carbon reduction goals and strategies, and was a member of Harvard's Greenhouse Gases Executive Committee.
He has been an advisor to the World Health Organization on indoor air pollution, personal exposure, and air pollution epidemiology.
In 2003, Spengler received the 9th Annual Heinz Award for outstanding contributions to research related to the environment.