Description:The reports presented here discuss: General estimation of the radioactive contamination of the territories and radiation hazardous objects, including former military test sites, areas influenced due to Chernobyl and Mayak accidents, and territories of oil fields; Techniques and procedures of radioecological monitoring; Techniques of determining radionuclide concentrations and species in the environment. The cross-border transport of radionuclides between Kazakhstan, Uzbekistan, Kyrgyzstan, Tajikistan by the waterways of Central Asia is discussed and a number of cases are described where the redistribution and accumulation of the natural radionuclides resulted in dangerous radioecological situations. This book also provides a strong foundation on which to build further multilateral programmes that can enhance understanding and cooperation in addressing the issues surrounding the sites where nuclear weapons were once tested.