My research focuses on environmental health and environmental justice. I am particularly interested in addressing the double jeopardy faced by communities of color and the poor who experience high exposures to environmental hazards and who are more vulnerable to the toxic effects of pollution due to poverty, malnutrition, discrimination, and underlying health conditions. How do matters of race and class affect distributions of health risks in the United States? What are the causes and consequences of environmental disparities and health inequalities? How can research create "upstream" opportunities for intervention and prevention? I am also interested in evaluating the influence of community participation on environmental health research, science, regulation, and policy-making, as well as in developing methods to foster community-based participatory research.