Concerned with the need to reduce chemical risks, this text also covers related biological and physical risks. Risk reduction has an important economic role, not least in developing countries. Many of the contributors are from develping countries and indicate the problems and some of the solutions their countries will need to adopt during their process of reconstruction, development and recovery. The text discusses the decision-making process involving the political, socioeconomic, engineering, and natural sciences so as to develop, analyze and compare regulatory options. It considers how such measured decision making enables the selection of optimal responses to achieve safety from perceived hazards.