Is healthy life at risk from environmental factors? If so, how much, and what can or should be done about it? In this book leading medical scientists and environmentalists look at the connectins between the environment, social policy, and levels of well-being in both developing and developed countries. Topics covered include nuclear power, food supply, and water quality. Disease is considered, especially in the context of the tropics, and the connections betwwen the virulence of infectious diseases and environmental conditions are examined. Genetic aspects of susceptibility to disease are also considered. The contributions in this book originated as Linacre Lectures at the University of Oxford.