Joel Schwartz, Ph. D is a Professor in the departments of Environmental Health and Epidemiology at the Harvard School of Public Health, on the steering committee of the Harvard University Center for the Environment, and Director of the Harvard Center for Risk Analysis. His major research interests include health effects of air pollution, of heavy metals, climate change, and drinking water. He has examined these questions using a variety of methods including time series, case-crossover, and case-only analyses of administrative data, survival and repeated measures analyses of cohorts, panel studies, etc. These have included a range of outcomes from cognitive function to biomarkers of heart disease to mortality. He has recently focused on environmental epigenetics, as well as gene-environment interaction studies. In addition, he has been involved in exposure modelling, including both land use regression approaches as well as use of remote sensing data and chemical transport models, and in methodological issues, including dose-response modelling, causal modelling, and data fusion. Prof. Joel Schwartz was a recipient of a John D and Catherine T MacArthur Fellowship.