This course includes discussion of uptake, metabolism and excretion of different environmental contaminants as well as a survey of methods for analysis and characterisation of metabolites of substances that are or might be a threat to the environment or to human health. This will be illustrated by laboratory experiments. Terms and definitions regarding risk philosophy are introduced. The students will learn about statistical methods relevant to environmental chemistry and get basic knowledge in toxicological properties and consequences of environmental pollutants. Within the independent project the student should propose and assess risk characterisation and/or assessments from a chemical perspective.