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The North-West Passage (circled left) and the North-East Passage (top right) are both clear of ice now, as shown in satellite photos.
It is an historic event.
But is the world without a North Pole a good thing? Shipping companies and ExxonMobil may love the idea. Climate change scientists are wary.
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Polar bears are less enthusiastic, some now facing a 400-mile swim for survival.
And for the rest of us? Is this really such good news?
Categories: GlobalWarming