Environmental Radioactivity is the most comprehensive compilation of information on the subject of radioactive contamination of the environment---from natural and manmade sources---covering incidents, accidents, industrial and military practices anywhere in the world. The book is essential reading for physical scientists studying the current and lasting effects of radiation. The book includes not only a full discussion and description of radioactivity in the environment, giving information about the sources (natural, industrial, military including accidents), quantitative descriptions of the contamination (spatial, temporal, chemical and physical forms), but also the dose impact (dose to members of the public or occupations) and health impact. In addition, discussion is provided on how and where radionuclides moves in the environment, the fundamental principles to assess those movements, limiting regulations on contamination, and clean up efforts. As such it is an indispensable and authoritative source of information for nuclear, regulatory, environmental, and health workers. This up-to-date new edition is, and will continue to be, a one-of-kind text, being both technical and readable, and is the definitive starting place for students, academicians, industrial researchers, or law and policy makers interested in the ``what, where, why or how'' of environmental radioactivity.