Environment is one of the most significant topics of world today. This book covers comprehensively topics related to Environment, Ecology, Bio Diversity, Pollution, Climate Change and Disaster Management in simple and Exam oriented approach. This book covers basics from school Board curriculum as it ensure strong foundation. We have provided basic definitions wherever needed to improve understanding of aspirants. The book provides comprehensive coverage of syllabus. It will give enough idea for both Preliminary and Mains angle. The book also made an effort to keep the language simple without compromising the effectiveness or diluting the analysis and serve as a ready-reference material for aspirants from diverse backgrounds. It is much needed handbook for this particular area and compelling read for aspirants appearing for TNPSC Exams.