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The Lexicon for Ethics, Integrity and Aptitude has been the closest in interpreting the syllabic content for GS Paper IV. Having established itself as the leader in its domain; the present edition is an upgraded version. It provides with the âobjectiveâ keys to solve the Case Study Questions. Apart from this, it has all the literal and application meaning for all the words that are subtly related but explicitly different. In a book what you get is a complete read for excelling in your GS Paper IV for the Mains. It could also be useful for general reading for anyone interested in knowing about all that is good for human existence. ABOUT ENVIRONMENT :- To help students in acquiring the essentials of the topic 'Environmentâ during preparation for Civil services examination, Shankar IAS academy has brought the book, 'Environmentâ. This book follows the paper pattern and syllabus given by Union Public Service commission which conducts these examinations. The language of the book is simple and the content is engaging which ensures students face no trouble during studying. Plus the distinctive designing makes it easy to navigate and read. This bestseller book has sold over 30, 000 copies and is widely read by students. A team of highly experienced writers from Shankar IAS Academy have written this book and hence it is accurate and reliable. The updated syllabus of UPSC focuses a lot on environment. The Geography paper of the Civil Service examination includes topics on environment and hence it is important for students to have thorough understanding of this topic. This book is completely dedicated on Environment and covers all concepts and points. It focuses on topics like Environmental ecology, Bio-diversity and Climate Change. Some of the topics discussed in the book include Ecological Pyramid and Nutrient Cycling, Ecosystem Rainforest, Deciduous Monsoon Forest, Biome, Bread Basket Region, Food Chain, Primary Consumer, Food Web, Ecological Pyramid, Ecological Explosion, Ecotone, Chemosynthesis, Biogeochemical cycle, Miss Semple, Possibilism, Stratosphere, Biosphere, Species Types, Nutritional eutrophication, acid rain, Marble Cancer, Soil Types, biogeographical realm, xerophytic, Nitrogen Cycle, Greenhouse Gas, Biodiversity Hotspots, Ozone Depletion, Club of Rome, Planktonic, Biological Magnification, Young lakes, Good Ozone and Bio-diversity loss. Along with clear explanations the book gives adequate practice for students so that they can test their knowledge and check their understandings. Shankar IAS Academy began its journey in the year 2004 with the vision of training the civil service aspirants in a focused manner and providing complete preparation. The founder of the academy Mr. D. Shankar was also an aspirant and had made upto interview in 2004 -2006. Since its inception, this academy has produced many Civil Servants and is one of the most popular training centres for UPSC exams. To help in students in studies and to provide quality study material, this academy has published various books which have become bestsellers. Some of their other books include Internal Security, Indian Economy, Agriculture, Government and History of the World.