Q90 / 270 · NDA 2023 (Phase 1) · General Ability

Which one of the following is not a main greenhouse gas?

A
Water vapour
Correct answer
B
Oxygen
C
Carbon dioxide
D
Methane

Solution

Oxygen is not an example of greenhouse gases. The main greenhouse gases whose concentrations are rising are carbon dioxide $\left(\mathrm{CO}_2\right)$, Methane $\left(\mathrm{CH}_4\right)$, Nitrous Oxide, Hydrochlorofluorocarbons (HCFCs), Hydrofluorocarbons (HFCs) and Ozone in the lower atmosphere.

Hence, the correct answer is option: 'B'.

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