Discussion
Which gas is mostly responsible for global warming ?
Answer: D
The gas mostly responsible for global warming is carbon dioxide.
Carbon dioxide, released mainly by burning coal, oil and natural gas and by deforestation, is the largest contributor to human-caused global warming because of the huge quantities emitted and its long life in the atmosphere. It accounts for roughly two-thirds or more of the warming effect of long-lived greenhouse gases.
Methane, nitrous oxide and CFCs trap more heat per molecule, but they are present in much smaller amounts, so their total contribution is smaller than that of carbon dioxide.
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