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Environment HDPN – High Density PYQ Notes

Comprehensive High Density PYQ Notes for UPSC Prelims – Environment & Ecology. Covers 3500+ Previous Year Questions (1995–2025) on Ecology, Biodiversity, Climate Change, Pollution, Environmental Acts & Laws, International Conventions (CITES, Ramsar, CBD), National Parks & Wildlife Sanctuaries, and Environmental Schemes. Each question includes the correct answer, key facts, critical traps, and bilingual explanations. Includes Master Reference Tables for conventions, national parks, and endangered species. Available in English and Hindi medium.