Shows that we have the scientific tools to reveal the connection between the environment and disease in a way never before possible, and even to predict which chemicals pose the greatest risk. World-renowned epidemiologist Devra Davis describes how the science of environmental epidemiology arose and how environmental toxins affect a broad spectrum of human health, including breast cancer, the health and development of the lungs, and even male reproductive capacity. Shows how the environment is affecting health, what we can do about it, and why standard approaches to public health need to change.