What is the correct increasing order of the Global Warming Potential of the following air pollutants?

1.CFC-11 (CCl3F)

2.Nitrous oxide (N2O)

3.Carbon dioxide (CO2)

4.Methane (CH4)

A4, 3, 2, 1

B1, 3, 4, 2

C3, 4, 2, 1 ✓ Correct

D2, 4, 3, 1

Correct answer: (C) 3, 4, 2, 1

Explanation

Global warming potential rises from carbon dioxide, to methane, to nitrous oxide, to the chlorofluorocarbon.

Statement 3: carbon dioxide is the baseline with the lowest potential of one.

Statement 4: methane is tens of times stronger than carbon dioxide.

Statement 2: nitrous oxide is hundreds of times stronger than carbon dioxide.

Statement 1: CFC-11 has the highest potential, thousands of times that of carbon dioxide.

The increasing order therefore runs carbon dioxide, methane, nitrous oxide, CFC-11.

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