How dangerous is smoking? what are the risks of nuclear power or of climate change? What are the chances of dying on an airplane? More importantly, how do we use this information once we have it? The demand for risk analysts who are able to answer such questions has grown exponentially in recent years. Yet programmes to train these analysts have not kept pace. This book addresses that problem. The authors draw together, organize, and seek to unify previously disparate theories and methodologies connected with risk analysis for health, environmental, and technological problems. they also provide a variety of case studies and worked problems.