From 2012, Michael Brown writing at the Ecologist:
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It is now widely accepted that human-induced climate change is a potentially dangerous issue. In a year (2012) when 15,000 temperature records were set in March alone and many freak weather patterns continued to cause drought and flooding across the globe the danger seems increasingly real and undeniable.
The latest addition to these concerns is the release of methane gas from the Arctic permafrost. Recently it was announced that the Russian research vessel Academician Lavrentiev had made discoveries of hundreds of methane gas eruptions in a 10,000 square mile area of the Arctic Ocean. Russian researcher Dr Igor Semiletov stated: “These are methane fields on a scale not seen before. We found more than 100 fountains, some more than a kilometre across. The emissions went directly into the atmosphere.”
Methane is a greenhouse gas that is estimated to be about 20 times more potent than carbon dioxide (CO2).