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25 June 2010

Sprawl makes for hotter cities

If global warming does drive temperatures upward, cities with urban sprawl may be more prone to extreme heat than less spread-out centres, new research suggests.

If global warming does drive temperatures upward, cities with urban sprawl may be more prone to extreme heat than less spread-out centres, new research suggests.

Stone and his colleagues -- who report their findings online in the June 22nd issue of Environmental Health Perspectives -- base their observations on an analysis of the number of very hot days that occurred between 1956 and 2005 in 53 U.S. metropolitan regions. "Very hot days" were defined as being higher than 85 percent of the heat stress index, which combines temperature and humidity.

 
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