Arctic sea ice has reached its lowest ever recorded extent, signalling that man-made global warming is having a major impact on the polar region.
With the melt happening at an unprecedented rate of more than 100,000 sq km a day, and at least a week of further melt expected before ice begins to reform ahead of the northern winter, satellites are expected to confirm that 2012 will smash the old record – set in 2007 – within days.
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