One decade after the accident at the Chernobyl nuclear power plant, the levels of radioactive contamination of the affected territories are generally well known. Through the impetus from national and international organizations, scientific and technical studies are being undertaken in order to reach a better understanding of the circumstances of the accident, the behavior of radioactive materials in different environmental media and the most efficient ways of decontamination. Doses received by populations have been and continue to be assessed. Taking into account the completed and ongoing studies by other organizations as well as the results of the International Chernobyl Project completed in 1991, the IAEA formulated, in co-operation with the Institut de Protection et de Surete Nucleaire (IPSN) in France, a project focusing on the environmental impact of the Chernobyl accident. The project aimed to make the findings of the scientists understandable to and relevant for the decision makers, who form the target group. Thus the study focused on the environmental impact in the future and was complementary to the other studies performed. It was a synthesis of available material and reports. Refs, figs, tabs.