Crop biomass burning atmospheric emissions
Question
Consider the following:
Which of the above are released into atmosphere due to the burning of crop/biomass residue?
- 1.
Carbon monoxide
- 2.
Methane
- 3.
Ozone
- 4.
Sulphur dioxide
Options
1 and 2 only
2, 3 and 4 only
1 and 4 only
1, 2, 3 and 4
Explanation
Burning of crop/biomass residue releases multiple pollutants: Carbon monoxide (1) is released due to incomplete combustion during biomass burning. Methane (2) is released from anaerobic decomposition processes during burning. Ozone (3) is formed secondarily in the atmosphere from precursor gases including NOx and volatile organic compounds released during burning. Sulphur dioxide (4) is released when biomass containing sulphur compounds is burned. All four substances are released directly or formed as secondary pollutants from crop burning, making this a major source of air pollution, particularly in regions like North India during crop harvest seasons. > Crop burning: releases CO, CH4; forms O3; releases SO2—multiple pollutants. Answer: (d).
Question details
Year
2019
Paper
GS Paper 1
Question
Q35
Subject
Environment
Sub-topic
Air pollution and burning of crop residue
Type
Statement-based
Difficulty
Medium
Nature
Static
Source hint
NCERT Environmental Science
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