David O. Carpenter MD, director of the Institute for Health and the Environment at the University of Albany, where he is also professor of environmental health and toxicology and former dean of the School of Public Health, discusses where and how people are exposed to environmental stressors and what role of public health institutions in protecting us.

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SHOW INTRODUCTION Rachel Carson wrote her groundbreaking book warning the world about the long term health effects of DDT in 1962, two years before her death from cancer at 56. Since then there have been other urgent warnings by naturalists and scientists. And still the layers of exposures mount up. There's discussion about allowable limits and parts per million but the newest reports show that there is no safe dose for toxins like lead and ionizing radiation. And what about children with their developing brains and smaller bodies? What about exposures in concert: how do these pollutants effect us when they come at us in combination? And how is it that new technologies and chemicals are being introduced without regard for the precautionary principle? Today we're joined by Dr. David O. Carpenter whose long career has been devoted to the study of toxins and their health effects. Join us for a discussion this hour about Public Health and Toxic Waste