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One of the most terrifying observed effects of climate change are reports from a Russian survey operating off the Eastern Siberian Arctic Shelf. Researchers reported huge plumes of methane making the sea "boil" over areas of a 100 meters or more. Huge volumes of methane - a gas with 30 times the warming potential of carbon dioxide - are frozen into the permafrost - if this is released in a warming world it could rapidly accelerate warming to dangerously high levels
