rrohbeck writes "The Independent reports brand-new results of high concentrations of methane — 100x normal — above the sea surface over the Siberian continental shelf. A large number of methane plumes have been discovered bubbling up from the sea floor. This is probably due to methane clathrate, buried under the sea floor before the last ice age, breaking up as higher water temperatures melt the permafrost that had contained it."
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