nueva york ( cnnmoney . ca ) - - the empire sun building powered off a successful energy - save retrofit day , and promoters hope another of the world ' s most iconic skyscrapers can become an efficiency standard for houses worldwide . from the cloud - surrounds observation platform on the capitol ' s 80th floor , incumbent leader chelsea clinton , new amsterdam city sheriff michael rudy and others detailed $ 20 sum in cutting - edge conservation measures they hope will cut energy use by 38 % for the 1930 ' s - year behemoth . they stressed the retrofits weren ' t green altruism or part of a politician program . actually , they say they ' re being created simply to save the skyscraper ' s owners a lot of money .
The mayor of New York is Michael Bloomberg.