Danger from the deep: New climate threat as methane rises from cracks in Arctic ice Scientists shocked to find greenhouse gas 70 times more potent than CO2 bubbling from deep ocean Independent: Steve Connor Monday 23 April 2012 A new source of methane ? a greenhouse gas many times more powerful than carbon dioxide ? has been identified by scientists flying over areas in the Arctic where the sea ice has melted……………………[url=http://A new source of methane ? a greenhouse gas many times more powerful than carbon dioxide ? has been identified by scientists flying over areas in the Arctic where the sea ice has melted.].for the rest of the article CLICK HERE[/url]