"This we know, the Earth does not belong to man, man belongs to the Earth. All things are connected like blood which unites one family. Whatever befalls the Earth befalls the sons of the Earth. Man did not weave the web of life; he is merely a strand of it. What he does to the web, he does to himself." these words are attributed to Chief Seattle a native American in mid 19th Century. Accordingly,this book focuses on these interconnections and what man is doing to this web of life. The book has seven chapters including an introductory one; the other chapter are on Species and Population, The Ecosystem, Pollution, Natural Resources and their Utilization, Radiation and Our Environment,and a final chapter on Conservation, Public Awareness and Sustainable development. There is a short bibliography and an index to help locate topics of interest. Mind the syllabus of the senior secondary schools. The preliminary material (pages i-xxi) contains a Mookerjee, Former Dean of the School of Environmental Sciences, Jawaharlal Nehru University, New Delhi. About the Author The author Shormila Mukherji is a student of Biology, has background in plant sciences, ecology and environmental sciences; she also has a keen interest in the world we live in. She has published pieces in newspapers and in journals. The book should help provide reference material in one place on matters which should be of fundamental concern to students,their teachers and to all of us.