Though not as prevalent in the atmosphere as carbon dioxide, methane is a far more potent greenhouse gas. Occurring naturally as well as being manmade, methane is much shorter-lived than CO2, but it is fast acting and 20 to 80 times as effective at trapping heat. A little extra methane goes a long way.
from Health & Medicine News -- ScienceDaily https://www.sciencedaily.com/releases/2020/03/200309135404.htm
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