is an introduction to the major pollutants currently arousing concern and a description how scientists monitor the composition of the atmosphere and assess emissions. Approaching atmospheric change in the context of its effects on the natural environment, people and the global climate system, examines: BL Atmospheric pollution at global, continental and local scales BL The development of policy at national and international levels BL The major computer modelling approaches which help us to understand and forecast the behaviour of pollutants and their impacts BL The success (or otherwise) of policies designed to reduce air pollution and the prospects for the future. With extensive references to useful web sites and further reading, will be of great benefit to senior undergraduate and postgraduate students.