Polar Ice Likely to Disappear This Summer

It seems unthinkable, but for the first time in human history, ice is on course to disappear entirely from the North Pole this year. The disappearance of the Arctic sea ice, making it possible to reach the Pole sailing in a boat through open water, would be one of the most dramatic ? and worrying ? examples of the impact of global warming on the planet. Scientists say the ice at 90 degrees north may well have melted away by the summer.