Paper 1 · People, Development and Environment
UGC NET December 2021 June 2022 (01.10.2022) Shift-II
Which of the following are greenhouse gases?
- Carbon dioxide
- Nitrogen dioxide
- Methane
- Chlorofluorocarbons
- Benzene
A1, 2 & 3 only
B1, 2, 3 & 4 only
C1, 3 & 4 only ✓ Correct
D3, 4 & 5 only
Correct answer: (C) 1, 3 & 4 only — The answer is 1, 3 and 4.
Explanation
★The answer is 1, 3 and 4.
★Carbon dioxide traps heat in the atmosphere, which is item 1.
★Methane is a strong greenhouse gas, which is item 3.
★Chlorofluorocarbons are also greenhouse gases, which is item 4.
★Nitrogen dioxide is an air pollutant but not counted among the main greenhouse gases here, so item 2 is excluded.
★Benzene is not a greenhouse gas, so item 5 is excluded.
★So the answer is 1, 3 and 4.
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