Inhabitat has a great tour of the new Cooper Union building at 41 Cooper Square in the East Village, designed by Morphosis. It's been certified LEED Platinum, which is the highest level of greenness a building can achieve.
The focus of the design is on a four-story central staircase lined with irregular latticework, which is visible from many of the interior rooms. The roof garden helps to insulate the building and recycle some of the CO2 it emits. Read the full piece here to learn more about green strategies.