Bright is the new black: New York roofs go cool

Source: http://www.physorg.com/news/2012-03-bright-black-york-roofs-cool.html

On the hottest day of the New York City summer in 2011, a white roof covering was measured at 42 degrees Fahrenheit cooler than the traditional black roof it was being compared to, according to a study including NASA scientists that details the first scientific results from the city's unprecedented effort to brighten rooftops and reduce its "urban heat island" effect.