Environmental Ecology (UPSC CSE) — Study Resources & PYQs
General issues on Environmental ecology, Bio-diversity and Climate Change - that do not require subject specialization.
Study resources
- Understanding Ecotones and Energy Flow in Ecosystems | UPSC Prelims 2026 | Drishti IAS English (Video) — Drishti IAS : English · 29 min · English
- Ecology, Levels of Organisation, Principles of Ecology (Article) — INSIGHTS IAS
- Ecosystem (Biology, Class XII, Chapter 12) (PDF) — NCERT (official textbook)