This book is written by internationally-famous soil biologists and environmental scientists who are engaged in the related field of metal contamination for many years. The book is an excellent book on the process and environmental factors that influence the specification, availability, mobility, transfer mechanism and toxicity of metals in the ecosystem. The case studies of different ecosystems contribute to better understanding of metal and pollutant sources cycling and will be useful to those planning for restoring contaminated lands. The publication will also serve as a valuable reference textbook to soil and agricultural chemists, environmental scientists and ecologists and students who are interested in environmental sciences and affairs.