Helen Suh MacIntosh is an Associate Professor of Environmental Chemistry and Exposure Assessment at Harvard University’s School of Public Health. She is a world recognized expert in environmental exposure assessment, with her research focusing primarily on air pollution and its impact on cardiopulmonary health. She has directed numerous environmental and epidemiological studies, with findings from these studies used to set national and international air pollution standards. She speaks often at conferences, symposiums, and seminars about environmental health issues and advises local, state, federal and international agencies and organizations on the measurement and assessment of health impacts from pollution. In addition, Helen is committed to teaching and education, both in the classroom and as an advisor and mentor. Her environmental outreach and advice can also be found on her personal website.