Methane levels rose last year for the first time since 1998. NOAA scientist Ed Dlugokencky said rapid industrialisation in Asia and rising wetland emissions in the Arctic and tropics are the most likely causes of the increase.
and permafrost thaws, carbon could seep into the atmosphere in the form of methane, possibly fuelling a cycle of carbon release and
"We’re on the lookout for the first sign of a methane release from thawing Arctic permafrost," said Dlugokencky. "It’s too soon to tell
whether last year’s spike in emissions includes the start of such a trend."
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