The imminent threat to humanity comes from the destruction of the earth’s environment. Without realising that the earth is the only planet that can sustain all living things, man is continuously destroying it. Yet almost all nations have given ecology a low priority. The most urgent problem at the international level today is to maintain the balance of nature and to make the earth a safe and healthy place to live in for the present and future generations. The books, introducing the subject of environmental science, describe the various ways in which nature has endowed us for a happy living. It also discusses the numerous ways in which man is polluting the various systems in the environment. It suggests methods of creating an awareness of the need to preserve the ecosystem. The book covers the subject of environmental education in a comprehensive manner from the pedagogical point of view.