Multiple Choice
How has human activity since the 19th century affected atmospheric concentrations of methane?
A) Since 1800, the atmospheric concentration of methane has more than doubled
B) Since 1800, the atmospheric concentration of methane has increased by less than 200%
C) Has increased at a rate even faster than carbon dioxide
D) The increase has been associated with biomass burning and the creation of landfills
Correct Answer:
Verified
Correct Answer:
Verified
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