Target Prelims 2026 | Revision with MCQs | Environment & Ecology | Episode 1 | Drishti IAS

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In this session of Target Prelims 2026 Revision with MCQs, important questions from Environment & Ecology, a crucial subject for UPSC Prelims, are discussed in a detailed and exam-oriented manner. The lecture covers key concepts such as Gross Primary Productivity (GPP) and Net Primary Productivity (NPP), ecological pyramids, food chain and trophic levels, ecological succession including pioneer and climax communities, inter-species interactions like commensalism, parasitism and amensalism, bioaccumulation, and homeostasis in ecosystems. It also explains important environmental conventions such as the Basel Convention, Rotterdam Convention, and Forest Carbon Partnership Facility. Through MCQs and detailed explanations, this session helps aspirants strengthen conceptual clarity and improve accuracy for UPSC Prelims 2026. Additionally, Drishti IAS offers a GS Foundation Live Online Course designed to complete your preparation in a structured manner with comprehensive notes, tests, and current affairs coverage. For more details, call 87501 87501, and don’t forget to like, share, and subscribe for more UPSC-focused content.


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