Scientists are concerned about the release of methane from the arctic because
a.
as a g...
Scientists are concerned about the release of methane from the arctic because
a.
as a greenhouse gas methane is 20 times more potent than carbon dioxide
b.
the mass of the arctic’s methane is comparable to that of the earth’s coal beds
c.
global warming appears to be accelerating its release
d.
all of the above
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