Plan to refreeze Arctic sea ice shows promise in first tests

A bold plan to pump seawater over the frozen Arctic Ocean could offer humanity a final chance to save the region’s vanishing sea ice.

Field trials conducted this year in the Canadian Arctic to thicken sea ice using water from the ocean below have proved successful, says UK start-up Real Ice.

Arctic sea ice cover is shrinking rapidly in response to climate change. Many scientists expect the region to…