Which of the following statements is/are true about methane as a greenhouse gas?
AMethane is the second most abundant anthropogenic greenhouse gas after carbon dioxide
BMethane accounts for about 20 percent of global emissions
CMethane is 25 times more potent than carbon dioxide at trapping heat in the atmosphere
DAll of the above ✓ Correct
Correct answer: (D) All of the above
Explanation
Methane ranks as the second most abundant human-caused greenhouse gas after carbon dioxide, which is correct.
It accounts for roughly twenty percent of global emissions, which is correct.
It traps heat about twenty-five times more effectively than carbon dioxide, which is correct.
Methane's atmospheric lifetime is far shorter than carbon dioxide's, around a decade.
Each of these three descriptions about methane holds true.
Major methane sources include paddy fields, livestock, landfills and fossil fuel extraction.
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