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Welcome to the eGyanKosh resource page for Block-4 of the Environment and Resources study material from IGNOU for the year 2025. This comprehensive collection is designed to support your learning journey by providing easy access to essential study materials that cover critical topics in environmental science and resource management. Whether you’re a student aiming to deepen your understanding or an educator looking for supplementary resources, this page offers a wealth of information available for free download. Explore the materials and enrich your academic experience in the fascinating field of environmental studies.