Name Atmospheric Global Warming lifetime Global Warming Potential Global Warming Potential Potential (years) (20 year) |(100 year) |(500 year) Carbon dioxide 50-200 (CO,) 1 1 1 Methane (CH,) 12 56 21 6.5 Nitrous oxide (N,O) 120 280 310 170 HFC-134a 15 3400 1300 420 ) Above is a table with information about some major greenhouse gases. Methane has a global warming potential (GWP) much higher on a 20-year scale than a 500-year scale. Why does methane have a much higher GWP-20 than GWP-500? Use a complete sentence to answer this question.

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