The Environmental Protection Agency has found PCB contamination to be "prevalent" in New York City schools, and as the school year gets under way, parent, teacher and community groups have been demanding the cleanup of affected schools. Industrial hygienist Monona Rossol, author of Pick Your Poison: How Our Mad Dash to Chemical Utopia is Making Lab Rats of Us All, and Miranda Massie of New York Lawyers for the Public Interest, explain the dangers of these chemicals and looks at how to eliminate them.