UN warns of 'megadisasters' linked to climate change

The United Nations on Tuesday raised the prospect of "megadisasters" affecting millions of people in some of the world's biggest cities unless more is done to heed the threat of climate change.

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<p><a href="http://www.physorg.com/news164425929.html">UN warns of 'megadisasters' linked to climate change</a></p> <p>The United Nations on Tuesday raised the prospect of "megadisasters" affecting millions of people in some of the world's biggest cities unless more is done to heed the threat of climate change.</p>