Climate change could render much of world uninhabitable

Hot enough for you?

A worst-case scenario of global warming, in which temperatures would soar some 21 degrees, is that much of the world may simply become too hot for humans to live in, according to new research published last week in the Proceedings of the National Academy of Sciences.

"We found that … a 21-degree warming would put half of the world’s population in an uninhabitable environment,"says study co-author Matthew Huber of Purdue University.

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