Independent: The sudden release from the melting Arctic of vast quantities of methane a greenhouse gas at least 20 times more potent than carbon dioxide is an economic time-bomb that could explode at a cost of $60 trillion (40tr) to the global economy, a study has concluded.
A scientific assessment of the costs associated with the release of Arctic methane into the atmosphere has found that the financial consequences to the world would almost equal the entire global economic output of one year.
Scientists...