Notice he doesn’t say which buildings . . . probably because putting a giant windmill on top of a giant skyscraper creates engineering stresses that said building was not designed to absorb:

In a plan that would drastically remake New York City’s skyline and shores, Mayor Michael R. Bloomberg is seeking to put wind turbines on the city’s bridges and skyscrapers and in its waters as part of a wide-ranging push to develop renewable energy. The plan, while still in its early stages, appears to be the boldest environmental proposal to date from the mayor, who has made energy efficiency a cornerstone of his administration. Mr. Bloomberg said he would ask private companies and investors to study how windmills can be built across the city, with the aim of weaning it off the nation’s overtaxed power grid, which has produced several crippling blackouts in New York over the last decade. Mr. Bloomberg did not specify which skyscrapers and bridges would be candidates for windmills, and city officials would need to work with property owners to identify the buildings that would best be able to hold the equipment. But aides said that for offshore locations, the city was eyeing the generally windy coast off Queens, Brooklyn and Long Island for turbines that could generate 10 percent of the city’s electricity needs within 10 years. “When it comes to producing clean power, we’re determined to make New York the No. 1 city in the nation,” Mr. Bloomberg said as he outlined his plans in a speech Tuesday night in Las Vegas, where a major conference on alternative energy is under way. He later evoked the image of the Statue of Liberty’s torch, saying he imagined it one day “powered by an ocean wind farm.” But the mayor’s proposal for wind power faces several serious obstacles: People are likely to oppose technologies that alter the appearance of their neighborhoods; wind-harnessing technology can be exceedingly expensive; and Mr. Bloomberg has less than 18 months left in office to put a plan into place. Turning New York City into a major source of wind power would likely take years, if not decades, and could require a thicket of permits from state and federal agencies. Parts of New York’s coastline, for example, are controlled by the federal government, from which private companies must lease access. Mr. Bloomberg is known for introducing ambitious proposals that later collapse, as did his congestion-pricing plan for Manhattan.

[UPDATE: A reader suggests that maybe Bloomie means this.]