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What melting ice sheets mean for the world

Scientists researching the huge Greenland ice sheet say this summer's melting has been one of the most severe on record, and it's raising the level of oceans around the globe. They say climate change is accelerating the rate of melting, and that will increasingly threaten millions of people living in coastal cities and low-lying areas. Our Science Editor David Shukman has this special report from Greenland.

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3 minutes

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