Question

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

Answer 1

D

Step-by-step explanation:

All of the above is true

Answer 2

d. All of the above.