7,000 massive methane gas bubbles under the Russian permafrost could explode anytime

Russian scientists have recently discovered some 7,000 underground methane bubbles in Siberia that could explode anytime.

‘Their appearance at such high latitudes is most likely linked to thawing permafrost,” explained a Russian Academy of Science spokesperson, “which is in turn linked to overall rise of temperature on the north of Eurasia during last several decades.”...
https://thinkprogress.org/methane-bubbles-arctic-769bf3f1b099