1 Syllabus

Aligned to the official UPSC CSE notification. Always re-check the latest PDF on UPSC exam syllabus.

• Prelims: General issues on Environmental Ecology, Biodiversity and Climate Change — that do not require subject specialisation.
• Mains GS-III: Conservation, environmental pollution and degradation, environmental impact assessment.
• Disaster and disaster management (often paired with geography/climate).

2 Previous year questions (PYQs)

Typical Environment PYQ themes:

• National parks, wildlife sanctuaries, biosphere reserves, Ramsar sites (map-based).
• Wildlife (Protection), Forest, EPA, CAMPA (as asked).
• Climate: UNFCCC, Paris, NDCs (themes).
• Pollution: air, plastic, e-waste, rivers.
• Species, IUCN categories, invasive species.

Official papers:

• Download PYQ hub
• Prelims GS PYQs
• Mains GS & Essay PYQs

3 Resources

• NCERT Biology Class 12 — ecology unit; Geography environment chapters.
• One concise environment compilation + map notebook.
• MoEFCC and ISFR summaries; IPCC SPM (selected).
• Link physical processes via Geography.

4 Strategy

• Static ecology first, then parks and conventions.
• Maintain an India map of protected areas you actually revise.
• Mains: problem → law/institution → community/technology → conclusion.
• Prelims: PYQ species and site lists beat random current affairs.

5 Common mistakes

• Rote-learning 200 park names with no map.
• Writing climate essays in a pollution question.
• Ignoring EIA and disaster management until Mains.
• Mixing summit news with ecology MCQs without the science.

6 Answer-writing example

Sample Mains demand: “Environmental Impact Assessment in India is often criticised as a clearance ritual. Suggest reforms.”

More on evaluated writing: How FIRST IAS INSTITUTE helps in answer writing.