Question

UPSC Prelims 2019 Question:

Consider the following

Carbon monoxide

Methane

Ozone

Sulphur dioxide

Which of the above are released into the atmosphere due to the burning of crop/biomass residue?

1. 1 and 2 only
2. 2, 3 and 4 only
3. 1 and 4 only
4. 1, 2, 3 and 4

Answer (Detailed Solution Below)

Option 4: 1, 2, 3 and 4

Detailed Solution

Explanation:

Crop residue burning is a potential source of GreenHouse Gases (GHGs) and other chemically and radiative gasses and aerosols.
Burning of these residues emit gasses like sulphur dioxide (SO2), oxides of nitrogen (NOx), carbon dioxide (CO2), carbon monoxide (CO), black carbon (BC), methane (CH4), volatile organic compounds (VOC), ozone (O3) etc. So, points 1, 2, 3 and 4 are correct.

Therefore, option (4) is the correct answer.

Subject: Environment | Pollution

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