Special Topic – UPSC Environment & Ecology Synopsis
UPSC Environment Revision | Page 39
Biodiversity, Climate Change and Renewable Energy
Environment and ecology are highly important for UPSC and competitive examinations. Understanding biodiversity, climate change, ecosystems and renewable energy is essential for sustainable development.
Environment and Ecology
Environment includes all living and non-living surroundings, while ecology studies interactions between organisms and environment.
Ecosystem
An ecosystem is a community of organisms interacting with their physical environment.
Components of Ecosystem
- Biotic Components
- Abiotic Components
Biotic Components
- Plants
- Animals
- Microorganisms
Abiotic Components
- Air
- Water
- Soil
- Sunlight
Food Chain and Food Web
Energy flows through ecosystems via food chains and food webs.
Example of Food Chain
Grass → Deer → Tiger
Biodiversity
Biodiversity refers to the variety of living organisms on Earth.
Importance of Biodiversity
- Maintains ecological balance
- Supports food security
- Provides medicinal resources
- Supports ecosystem stability
Biodiversity Hotspots
Biodiversity hotspots are regions with rich biodiversity and high threat levels.
Important Hotspots in India
- Western Ghats
- Eastern Himalayas
- Indo-Burma Region
Climate Change
Climate change refers to long-term changes in Earth’s climate patterns.
Causes of Climate Change
- Greenhouse gas emissions
- Deforestation
- Industrial pollution
- Burning of fossil fuels
Global Warming
Global warming is the increase in Earth’s average temperature.
Effects
- Melting glaciers
- Sea-level rise
- Extreme weather events
- Loss of biodiversity
Greenhouse Effect
Greenhouse gases trap heat in the atmosphere.
Major Greenhouse Gases
- Carbon dioxide
- Methane
- Nitrous oxide
Renewable Energy
Renewable energy comes from naturally replenished sources.
Types of Renewable Energy
- Solar Energy
- Wind Energy
- Hydropower
- Biomass Energy
Advantages of Renewable Energy
- Reduces pollution
- Supports sustainable development
- Reduces dependence on fossil fuels
Pollution
Pollution is the contamination of environment by harmful substances.
Types of Pollution
- Air Pollution
- Water Pollution
- Soil Pollution
- Noise Pollution
Conservation of Environment
Environmental conservation protects natural resources and ecosystems.
Methods
- Afforestation
- Wildlife protection
- Waste management
- Use of renewable energy
Important Environmental Agreements
- Paris Agreement
- Kyoto Protocol
- Montreal Protocol
Sustainable Development
Sustainable development meets present needs without harming future generations.
Important UPSC Facts
- Western Ghats is a biodiversity hotspot
- Global warming increases sea levels
- Solar energy is renewable energy
- Greenhouse gases cause climate change
- Paris Agreement focuses on climate action
Quick Revision Box
- Ecosystem → Interaction of organisms and environment
- Biodiversity → Variety of life
- Global Warming → Rise in Earth’s temperature
- Renewable Energy → Sustainable energy source
- Pollution → Environmental contamination
- Paris Agreement → Climate treaty
Mind Map – Environment & Ecology
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Environment & Ecology
- Ecosystem
- Biodiversity
- Climate Change
- Global Warming
- Renewable Energy
- Environmental Conservation
Shaktimatha Learning
UPSC Environment & Ecology Synopsis – English Version
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