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This is a completely revised and updated edition with instant approach. Latest information has been provided on topics like Ecosystems, Ecological Pyramids, Ecological Productivities, Biodiversity Conservation, Sustainable Development, Endemism, Hot Spots of Vegetation in India, Global Cooling, El Nina and LA Nina and on various problems associated with Environmental Pollution and Case studies etc. New chapters like Phytogeography of India, Afforestation, Social Forestry and Agro-forestry, Ecological Factors (Climatic, Edaphic, Topographic, Biotic etc.), Ecological Groups and their Adaptations, Concept of Ecosystems, Community Dynamics, Characteristics of Community, Population Dynamics, Practical Exercises on Ecology and Environmental Pollution offer special attractions and completeness of the subject. While accompanying all such features, additional information in Special boxes and updated Environmental Calendar make the book incredibly valuable. 1. Environmental Studies: An Introduction 2. Natural Resources and Energy Resources 3. Water Resources 4. Forest Resources 5. Phytogeography of India 6. Biodiversity 7. Threats to Biodiversity 8. Endemism and Hot Spots of Vegetation in India 9. Conservation of Biodiversity 10. Sustainable Development 11. Afforestation, Social-forestry and Agro-forestry 12. Introduction to Ecology 13. Ecological Factors: Climatic Factors 14. Soil or Edaphic Factors 15. Topographic Factors and Biotic Factors 16. Ecological Groups and Adaptations 17. Concept of Ecosystem 18. Structure and Functions of Ecosystem 19. Producers, Consumers and Decomposers 20. Energy Flow in Ecosystem 21. Food Chains, Food Webs and Ecological Pyramids 22. Various Ecosystems 23. Ecological Succession (Community Dynamics) 24. Characteristics of Community 25. Population Dynamics 26. Pollution: An Introduction 27. Air Pollution 28. Water Pollution 29. Water Borne and Water Induced Diseases and Fluoride Problem in Drinking Water 30. Soil Pollution 31. Marine Pollution 32. Noise and Thermal Pollution and Nuclear Hazards 33. Pollution Case Studies34. Select Environment Issues 35. Consumerism and Environmental Protection 36. Environment Protection Acts