Toxicology is an integral part of the risk assessment process.In this book, investigators from the scientific and regulatory communities describe recent technical developments in risk assessment embracing toxicology and its allied sciences, risk qualification and characterisation, risk management, and risk communication.Case studies pertaining to current issues involving chemical and environmental risks, including military and industrial scenarios, are presented.Chapters describe value and ethical choices underlying toxicological decisions, economic and legal implications of regulations, understanding risk, and recommendations of the commission on risk assessment and risk management.