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Topic Greenhouse Gases
Asked 3 times across 2 UPSC exams over 9 years (2016–2025), peaking in 2022.
Key insights
- Most tested in CSE — 2 of 3 PYQs
- Most asked in 2022
- Recurs across 3 years (2016–2025)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CSE 2016 → EPFO 2025
How the concept evolved
Rising — more than half its appearances (3 of 3) are since 2016.
Related concepts
Ideas UPSC tests alongside this one — keep exploring.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
EPFO2025
Which one among the following is the primary environmental concern associated with permafrost thawing in the Arctic ?
- A Displacement of the indigenous communities
- B Release of Methane and Carbon dioxide
- C Spread of invasive species
- D Increase of UV radiation
Answer key not yet available (pending official release)
Environment & Ecology › Climate Change
CSE2022
Among the following crops, which one is the most important anthropogenic source of both methane and nitrous oxide?
- A Cotton
- B Rice ✓
- C Sugarcane
- D Wheat
✓ Correct answer: (B)
Environment & Ecology › Climate Change
CSE2016
What is 'Greenhouse Gas Protocol'?
- A It is an international accounting tool for government and business leaders to understand, quantify and manage greenhouse gas emissions ✓
- B It is an initiative of the United Nations to offer financial incentives to developing countries to reduce greenhouse gas emissions and to adopt eco-friendly technologies
- C It is an inter-governmental agreement ratified by all the member countries of the United Nations to reduce greenhouse gas emissions to specified levels by the year 2022
- D It is one of the multilateral REDD+ initiatives hosted by the World Bank
✓ Correct answer: (A)
Environment & Ecology › Climate Change
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