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

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

[amp_mcq option1=”Water vapour” option2=”Oxygen” option3=”Carbon dioxide” option4=”Methane” correct=”option2″]

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UPSC NDA-1 – 2023

Oxygen (O₂) is not considered a main greenhouse gas. Greenhouse gases are atmospheric gases that absorb and emit infrared radiation, trapping heat in the atmosphere.

Main greenhouse gases include water vapour (H₂O), carbon dioxide (CO₂), methane (CH₄), nitrous oxide (N₂O), and ozone (O₃). Oxygen and Nitrogen, which make up the bulk of the atmosphere, do not absorb infrared radiation effectively and are not greenhouse gases.

Water vapour is the most abundant greenhouse gas in the atmosphere and contributes significantly to the natural greenhouse effect. Carbon dioxide and methane are major contributors to anthropogenic (human-caused) climate change due to their increased concentrations from activities like burning fossil fuels and agriculture.

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