Dr. Balmes has been the Director of the BCEPHT since its inception in 2002. He is a pulmonary physician who is Professor of Medicine at UCSF and Chief of the Division of Occupational and Environmental Medicine at San Francisco General Hospital. He is also Professor of Environmental Health Sciences in the School of Public Health at UC Berkeley where he is Director of the Northern California Center for Occupational and Environmental Health. Dr. Balmes has an active research program in the area of occupational and environmental respiratory disease that involves controlled human exposure studies of acute effects and epidemiological studies of chronic effects of air pollutants. He is currently funded to investigate genetic risk factors for ozone-induced airway inflammation, the long-term effect of exposures to air pollutants in a cohort of children with asthma in Fresno (the Fresno Asthmatic Children's Environment Study), the effects of various environmental factors on lung function and severity of disease in a cohort of asthmatic adults in northern California, and the chronic respiratory effects of biomass smoke exposure in a cohort of children in rural Guatemala.