Study: Billions could soon live in areas too hot for humans without air conditioning, study says

CBS News discusses how billions of people could soon live in areas too hot for humans without air conditioning, study says.

In just 50 years, 2 billion to 3.5 billion people, mostly poor who can’t afford air conditioning, will be living in a climate that historically has been too hot to handle, a new study says.

With every 1.8 degree increase in global average annual temperature from man-made climate change, about a billion or so people will end up in areas too warm day-in, day-out to be habitable without cooling technology, according to ecologist Marten Scheffer of Wageningen University in the Netherlands, co-author of the study.

How many people will end up at risk depends on how much heat-trapping carbon dioxide emissions are reduced and how fast the world population grows.

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