Methane released in the Arctic could raise global temperatures

Millions of tons of methane stored beneath the Arctic seabed is bubbling up to the surface and being released into the atmosphere as the region warms up and the ice retreats, scientists have said.

The gas is said to be 20 times more powerful than carbon dioxide and scientists have warned that it could accelerate global warming.


It is usually locked in a deep freeze below the sea, but as the ice melts on the surface, small holes, or