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Welcome to eGyanKosh’s Unit-3 on Environmental Components, specifically focusing on the vital resource of water. In this comprehensive study material, curated for IGNOU students in 2025, we delve into the multifaceted aspects of water—its significance, conservation, and the intricate balance it maintains within our ecosystem. This resource is designed to enhance your understanding of water-related environmental issues, providing you with the essential knowledge and tools needed for your academic pursuits. Best of all, this invaluable study material is available for free download, allowing you to access critical information at your convenience. Join us in exploring the depths of this essential element for life on Earth!