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UPSC 2019: Consider the following: 1. Carbon monoxide 2. Methane 3. Ozone 4. Sulphur dioxide Which of the above are released into atmosphere due to the burning of crop/biomass residue?
(a)1 and 2 only
(b)2, 3 and 4 only
(c)1 and 4 only
(d)1, 2, 3 and 4
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Not attemptedCorrect Answer: (d) 1, 2, 3 and 4
Incomplete combustion of crop/biomass residue releases a cocktail of gases that includes carbon monoxide (CO), methane (CH₄), precursor species that quickly photochemically generate ground-level ozone (therefore O₃ is considered among the emitted pollutants), and trace amounts of sulphur dioxide (SO₂) from residual sulphur in the plant matter. Hence all four listed gases can be associated with stubble-burning emissions, making option (d) correct. ([edukemy.com](https://edukemy.com/blog/upsc-prelims-2019-question-35/?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2019 Environment & Ecology question?▼
The correct answer is option (d): 1, 2, 3 and 4. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Pollution & Waste Management question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2019, GS Paper 1, as Question 35. It falls under Environment & Ecology > Pollution & Waste Management.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Pollution & Waste Management?▼
UPSC has asked 38 questions from Pollution & Waste Management (under Environment & Ecology) across multiple years. Visit the topic page to see the full list and year-wise trends.