This text brings together in one single comprehensive reference, the fundamentals of radioactivity. It uniquely fills the gap in the market, as no other books deal with environmental radioactivity to this degree. * Timely and invaluable as the studies of environmental processes and the awareness of the impact of human activity on our environment are increasing * Links all three main aspects of environmental radioactivity: Principles, Transport and Measurement * Useful to a wide readership - students, lecturers, researchers, companies and environmental consultants