"Risk assessment is of increasing importance as health and safety regulations grow and become more complicated. Focusing on environmental risk assessment, this book looks at various factors relating to exposure and toxicity, human health, and risk. The book is aimed at practitioners and students who need to know more about understanding, developing, conducting, and interpreting risk assessments. It provides sufficient background to enable readers to probe for themselves the science underlying the key issues in environmental risk"-- Chapter 1. Introduction to risk assessment with a nod to history -- chapter 2. Perception, planning and scoping, problem formulation, and hazard identification : all parts of risk assessment -- chapter 3. Exposure assessment -- chapter 4. Dose-response assessment -- chapter 5. Risk characterization -- chapter 6. Ecological risk assessment -- chapter 7. Future of risk assessment.