My research and teaching interests lie in the field of Environmental Health. Active research programs include:

• Effects of particulate matter on daily morbidity and mortality due to cardiovascular and pulmonary diseases in large cities.
• Chemical characteristics of fine particles responsible for the observed health effects.
• Exposure and health impacts related to indoor and outdoor air pollution including studies of indoor allergens, diesel vehicle emissions, volatile organic compounds, PAHs (polycyclic aromatic hydrocarbons), and other air toxins.
• Water and human health issues, such as drinking-water quality and human health risks associated with water contaminants.