The third edition of this book has been updated with the latest solved questions of the UPSC Preliminary and Main examination. The book approaches the topics of Environment and Ecology in a precise and focused manner. Through this book, readers can access a 15-hours Online Video Course (worth Rs.4999/-), by the author, in which he explains and covers all the key issues of the topics in a detailed manner, at a price of just Rs.49/- (more details inside the cover). Key Features Multi-coloured book with images and flowcharts for easy understanding Highlights key international and national environmental reports Covers key aspects of Environment from PIB updates, India Year Book and Yojana magazine Appendices covers Prelims and Mains questions Web support adds value to the learning process.