FRONTLINE examines new evidence in the controversy over the danger of manmade chemicals to human health and the environment, thirty-five years after Rachel Carson first raised concerns of an impending ecological crisis. Currently, millions in research and public relations dollars are being spent in the battle, and President Clinton is calling this one of his top environmental priorities. The film takes viewers inside the world of scientists, politicians, activists, and business officials embroiled in this high-stakes debate that threatens the multibillion dollar chemical industry.