By Minqi Li
The current evidence suggests that the Arctic Ocean could become ice free in summertime possibly as soon as 2013, about one century ahead of what is predicted by the IPCC models. With the complete melting of the Arctic summer sea ice, the disintegration of the Greenland ice sheets may become unavoidable, threatening to raise the sea level by five meters or more within this century. About half of the world’s fifty largest cities are at risk and hundreds of millions of people will become environmental refugees.
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