Which among the following are Natural Green House Gases (GHGs)?

1.CO2 (Carbon dioxide)

2.H2O (Water vapour)

3.CH4 (Methane)

4.O3 (Ozone)

5.CFC (Chlorofluorocarbon)

A1, 2, 3 & 4 only ✓ Correct

B1, 3, 4 & 5 only

C2, 3, 4 & 5 only

D1, 2, 3 & 5 only

Correct answer: (A) 1, 2, 3 & 4 only

Explanation

Carbon dioxide, water vapour, methane and ozone are all natural greenhouse gases.

Statement 1, carbon dioxide, occurs naturally and traps outgoing heat.

Statement 2, water vapour, is the most abundant natural greenhouse gas.

Statement 3, methane, and Statement 4, ozone, are naturally present greenhouse gases too.

Statement 5, chlorofluorocarbon, is entirely man-made and is not a natural greenhouse gas.

Water vapour contributes the largest share of the natural greenhouse effect.

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