Environmental biology is an important component of the environmental science and is concerned with the study of air, land, water and energy system in relation to the life. This book also describes the scientific, economic and social factors which have direct and indirect impact on human beings and their environment. The environmental biology emphasizes education in core scientific principles, critical reading and writing skills, and the ability to understand, apply and communicate. The book will prove useful not only to students but also to general readers interested in the subject.