A year ago, I reported on the largest green roof in New York City being installed on top of Silvercup Studios in Long Island City near the Queensboro Bridge. (Silvercup is the largest film and television studio in New York, where Sex and the City was filmed and the Sopranos still is. If you don't have Times Select, email me and I'll send a PDF of the Silvercup greenroof story for the Times.)
I was out there this afternoon and snapped a couple of pics. While green roofs are big in Chicago, they are pretty rare in New York and most other American cities. This one is 35,000 square feet (it's actually three green roofs spread out over the Silvercup site, one of which is literally on top of Tony Soprano's house). The pic below is of a monitoring system that is collecting data in order to show how much less storm water runoff there is as a result of the succulent plants absorbing rain, as well as temperature fluctuations and air quality measurements.
Silvercup Sunset [Polis]