Initial compulsory modules: present key chemical and microbiological concepts; emphasise the importance of microbial catalysis in low-temperature geochemistry; discuss the origins, toxicity and fates of organic and inorganic pollutants; and provide analytical skills; optional modules typically include: groundwater assessment; the uses of micro-organisms for remedial purposes; the management of contaminated land; the uses of biogeochemical tools for pollution control; and the commercial aspects of the environment business; plus: MSc: 100 credits of modules plus 80 credit research project/dissertation; diploma: 80 credits of modules plus 40 credit dissertation.