An art installation of a melting fan sits on display in a subway station Thursday, June 9, 2011, in Atlanta.
September 4, 2012 More than 20,000 high-temperature records have been broken so far this year in the United States. It's especially bad in urban areas, where cities are heating up about twice as fast as the rest of the planet. But a researcher in Atlanta is using the heat wave as an opportunity to do something about the warming planet.
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