Methane is approximately 23 times more powerful than carbon dioxide as a greenhouse gas.Which are significant sources of methane emissions?
I.The digestive systems of ruminants (cows,sheep,etc. )
II.Automobile exhaust
III.Rice cultivation
IV.Decaying wetland vegetation
A) I only
B) I and II only
C) II only
D) I,III,and IV only
Correct Answer:
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