Dr. Noelle Eckley Selin of the MIT Global Change Joint Program will speak in the MIT Atmospheric Science Seminar Series. Abstract: Concern about the human impacts of air pollution has prompted efforts to regulate emissions in both national and international policy arenas. A substantial challenge for scientists is identifying the pathways from emissions to human impacts in ways that are useful for policy decision making. This research connects global atmospheric chemical transport modeling to policy and economic analyses in order to evaluate policy options for reducing human impacts from mercury, ozone, and atmospheric particulate matter (PM). For mercury, we apply a global, 3D chemical transport model combined with ocean and ecosystem models to explore the influence of domestic and international mercury controls on exposure to fish methylmercury. For ozone, we use results from a global simulation of future atmospheric concentrations to assess the potential human health damages (including acute mortality and morbidity outcomes) and quantify their global economic impacts in sixteen world regions using economic modeling. For PM, we explore the potential air pollution co-benefits of controls on CO2 in developed and large developing countries. The potential for future policy-relevant analyses using this coupled atmospheric-economic-policy modeling framework is discussed.