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General Studies III· UPSC CSE
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Environment & EcologyFor UPSC Prelims & Mains

Ecology, biodiversity, climate action, and environmental governance.

UPSC-CSE/Environment & Ecology

CSAT (Paper II) — bridge from Environment

These topics are dense with statements, reports, and data—the same muscles UPSC tests in CSAT. Start from the hub, then drill the skills that match how you study this paper.

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Components of Ecosystem

Energy Flow and Nutrient Cycling

Food Chains and Food Webs

Ecological Pyramids

Forest Ecosystems

Grassland Ecosystems

Aquatic Ecosystems

Desert Ecosystems

Levels of Biodiversity

Biodiversity Hotspots

Endemic Species

Threats to Biodiversity

In-situ Conservation

Ex-situ Conservation

Conservation Strategies

Primary Succession

Secondary Succession

Population Dynamics

Population Interactions

Sources and Types of Air Pollutants

Smog and Acid Rain

Indoor Air Pollution

Air Quality Index

Sources of Water Pollution

Eutrophication

Groundwater Contamination

Marine Pollution

Soil Degradation

Pesticide and Fertilizer Pollution

Soil Erosion

Sources and Effects

Control Measures

Sources of Radioactive Pollution

Nuclear Accidents

Municipal Solid Waste

E-waste Management

Plastic Waste

Biomedical Waste

Greenhouse Gases

Natural vs Enhanced Greenhouse Effect

Global Warming Potential

Sea Level Rise

Extreme Weather Events

Impact on Agriculture

Impact on Biodiversity

Ozone Depleting Substances

Montreal Protocol

Ozone Hole

Carbon Sequestration

Renewable Energy

Energy Efficiency

Adaptation Strategies

Climate Resilience

Article 48A and 51A(g)

Directive Principles

Environment Protection Act 1986

Water Act 1974

Air Act 1981

Forest Conservation Act 1980

Wildlife Protection Act 1972

CITES

Project Tiger

EIA Process

Environmental Clearance

Central Pollution Control Board

State Pollution Control Boards

Powers and Functions

Important Judgments

Forest Types in India

Deforestation

Afforestation Programs

Community Forest Management

Water Cycle

Water Scarcity

Rainwater Harvesting

Watershed Management

Mining and Environment

Sustainable Mining

Renewable Energy Sources

Non-renewable Energy

Energy Conservation

Land Degradation

Desertification

Microbial Remediation

Phytoremediation

Sewage Treatment

Industrial Waste Treatment

Bioethanol

Biodiesel

Biogas

Clean Technology

Sustainable Development

UNFCCC

Kyoto Protocol

Paris Agreement

COP Meetings

Convention on Biological Diversity

Ramsar Convention

CITES

Basel Convention

Stockholm Convention

Rotterdam Convention

Environment Related SDGs

India and SDGs

Delhi Air Pollution

Stubble Burning

Vehicular Pollution

Groundwater Depletion

River Pollution

Urban Water Crisis

Urban Solid Waste

Plastic Pollution

Bhopal Gas Tragedy

Industrial Pollution

Coastal Zone Management

Marine Pollution

Chipko Movement

Narmada Bachao Andolan

Silent Valley Movement