For the past 22 years, Dr. Jerrett has researched how to characterize population exposures to air pollution and built environmental variables, how to understand the social distribution of these exposures among different groups (e.g., poor vs. wealthy), and how to assess the health effects from environmental exposures. Over the last decade, Dr. Jerrett has also studied the contribution of the built and natural environment to physical activity, obesity, and several health outcomes. In 2009, the United States National Academy of Science appointed Dr. Jerrett to the Committee on “Future of Human and Environmental Exposure Science in the 21st Century.” The committee recently concluded its task with the publication of a report entitled "Exposure Science in the 21st Century: A Vision and a Strategy." In 2013, the U.S. Environmental Protection Agency appointed Dr. Jerrett to the Clean Air Scientific Advisory Sub-Committee for Nitrogen Oxides. From 2014 to the present, Dr. Jerrett has been named to the Thomson Reuters List of Highly Cited Researchers, indicating he is in the top 1% of all authors in the fields of Environment/Ecology in terms of citation by other researchers.