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Environment & Ecology

UPSC CSE — GS Paper III

Mock Tests

MCQs on biodiversity, ecology, environmental conventions, climate change, protected areas, and Indian environmental legislation for UPSC CSE Prelims GS Paper III.

Environment Test 1

Key Topics

Biodiversity Hotspots IUCN Red List Ramsar Convention Paris Agreement Montreal Protocol CBD & Nagoya Protocol National Parks vs Sanctuaries Food Chains Carbon Credits EIA Wildlife Protection Act

Environment & Ecology carries 10–15 questions in UPSC Prelims — one of the fastest growing sections. International conventions (Ramsar, CBD, CITES, Paris) are asked almost every year.

About Environment & Ecology for UPSC CSE

These mock tests cover the Environment & Ecology syllabus for UPSC CSE Prelims — ecology concepts, biodiversity, climate change conventions, protected areas, and environmental laws.

What is the difference between National Parks, Wildlife Sanctuaries, and Biosphere Reserves?

National Park — Highest protection level. No human activity (including grazing, forestry) is permitted. Boundaries fixed by law and cannot be altered by State government without Parliament approval. Examples: Jim Corbett, Kaziranga, Sundarbans. Wildlife Sanctuary — Some human activities (grazing, forestry) may be permitted with permission. State government can alter boundaries. Primarily for protection of one or more species. Examples: Gir, Chilika. Biosphere Reserve — UNESCO designation. Has three zones: Core zone (strictly protected), Buffer zone (research and limited use), Transition zone (sustainable human activity). Examples: Nilgiri (first in India, 1986), Sundarban, Gulf of Mannar. India has 18 Biosphere Reserves; 12 are in UNESCO's World Network.

What are the key international environment conventions tested in UPSC?

Must-know conventions: Ramsar Convention (1971) — Wetlands of International Importance; India has 75+ Ramsar sites. CITES (1973) — Convention on International Trade in Endangered Species; three appendices based on threat level. Montreal Protocol (1987) — phasing out ozone-depleting substances (CFCs, HCFCs). Convention on Biological Diversity (CBD, 1992) — Nagoya Protocol (2010) on Access and Benefit Sharing from genetic resources. UNFCCC (1992) — Framework convention; led to Kyoto Protocol (1997) and Paris Agreement (2015). Paris Agreement (2015) — limit global warming to 1.5°C above pre-industrial levels; NDCs (Nationally Determined Contributions) submitted by each country.

What are biodiversity hotspots and which ones are in India?

A Biodiversity Hotspot (concept by Norman Myers) is a region with: (1) at least 1,500 endemic plant species, and (2) has lost at least 70% of its original vegetation. There are 36 global hotspots. India has parts of four: Western Ghats & Sri Lanka (extends along India's west coast — rich in endemics, UNESCO World Heritage), Eastern Himalayas (Indo-Burma hotspot — NE India), Indo-Burma (parts of NE India), and Sundaland (Andaman & Nicobar Islands). Western Ghats is one of the most species-rich hotspots globally and is frequently asked in UPSC.

What are the IUCN Red List categories?

IUCN Red List has 9 categories (from most to least threatened): Extinct (EX) — no known individuals; Extinct in Wild (EW) — survives only in captivity; Critically Endangered (CR) — extremely high risk of extinction; Endangered (EN) — very high risk; Vulnerable (VU) — high risk; Near Threatened (NT) — close to qualifying as threatened; Least Concern (LC) — widespread and abundant; Data Deficient (DD) — insufficient information; Not Evaluated (NE). UPSC frequently asks about specific animals — e.g., Bengal Tiger (Endangered), Snow Leopard (Vulnerable), Giant Panda (Vulnerable, recently downlisted), Cheetah (Vulnerable).