Our research in environmental epidemiology addresses associations between air pollution and health, climate change and health (with a specific emphasis on extreme temperatures) and environmental equity. Most research is accomplished using secondary datasets, including vital statistics data based in the U.S. and Latin America (Mexico, Chile and Brazil); data from large epidemiologic cohorts (Normative Aging Study, Multi-Ethnic Study of Atherosclerosis), and exposure data derived from ambient temperature and air pollution monitoring.  We are currently evaluating air pollution and preterm birth in Mexico City, and doing a 3 city study related to residential weatherization and vulnerability to heat stress.