> Shakhova et al. (2008) estimate that not less than 1,400 gigatonnes of carbon is presently locked up as methane and methane hydrates under the Arctic submarine permafrost, and 5–10% of that area is subject to puncturing by open talik. Their paper initially included the line that the "release of up to 50 gigatonnes of predicted amount of hydrate storage [is] highly possible for abrupt release at any time". A release on this scale would increase the methane content of the planet's atmosphere by a factor of twelve,[72][73] equivalent in greenhouse effect to a doubling in the 2008 level of CO2.
(however if you read further down, catastrophic methane clathrate release is apparently tought to be unlikely to happen on short-ish timescales after all)
https://en.wikipedia.org/wiki/Methane_clathrate
(however if you read further down, catastrophic methane clathrate release is apparently tought to be unlikely to happen on short-ish timescales after all)
And then there's livestock...