Topic Pollution
Asked 2 times across 2 UPSC exams over 41 years (1979–2020), peaking in 1979.
Key insights
- Most tested in CSE — 1 of 2 PYQs
- Most asked in 1979
- Recurs across 2 years (1979–2020)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CSE 1979 → NDA 2020
How the concept evolved
Long-running — most appearances (1 of 2) predate 2016, and it still returns.
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.
NDA2020
Which one of the following is a major environmental issue in eastern Canada ?
- A Acid precipitation
- B Groundwater depletion
- C Land degradation ✓
- D Desertification
✓ Correct answer: (C)
Environment & Ecology › Pollution & Waste
CSE1979
The Supersonic jets tend to cause
- A Destruction of ozone layer ✓
- B Sound pollution
- C Nervous system breakdown
- D All of the above
✓ Correct answer: (A)
Environment & Ecology › Pollution & Waste
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