I am Associate Professor in the Institute for Data, Systems and Society and the Department of Earth, Atmospheric and Planetary Sciences. My research uses atmospheric chemistry modeling to inform decision-making on air pollution, climate change and hazardous substances such as mercury and persistent organic pollutants (POPs). I received my PhD from Harvard University in Earth and Planetary Sciences as part of the Atmospheric Chemistry Modeling Group, where I developed and evaluated a global, 3D model of mercury pollution. Prior to joining the MIT faculty, I was a research scientist with the MIT Joint Program on the Science and Policy of Global Change.  In addition to my modeling work, I have published articles and book chapters on the interactions between science and policy in international environmental negotiations, in particular focusing on global efforts to regulate hazardous substances. Previously, I was a research associate with the Initiative on Science and Technology for Sustainability at Harvard’s Kennedy School, a visiting researcher at the European Environment Agency in Copenhagen, Denmark, and worked on chemicals issues at the U.S. Environmental Protection Agency. On campus, I am also affiliated with the MIT Joint Program on the Science and Policy of Global Change and the MIT Center for Environmental Health Sciences.