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On Top of New York City’s °CoolRoofs
Officially launched in May 2010, NYC °CoolRoofs alters the flat roofs of New York City from black and gray to white, with a goal to paint 6 million square feet of the city’s roofs. The goal is simple: use white paint to reflect the solar rays and to reduce the amount of heat that black roofs capture.

http://newyork.untappedcities.com/2012/07/26/on-top-of-new-york-citys-coolroofs/