Hearst Tower is the first green building completed in New York City, with a number of environmental considerations built into the plan. The floor of the atrium is paved with heat conductive limestone. Polyethylene tubing is embedded under the floor and filled with circulating water for cooling in the summer and heating in the winter. Rain collected on the roof is stored in a tank in the basement for use in the cooling system, to irrigate plants and for the water sculpture in the main lobby. The building was constructed using 80% recycled steel. Overall, the building has been designed to use 25% less energy than the minimum requirements for the city of New York, and earned a gold designation from the United States Green Building Council’s LEED certification program.
I took a double decker NYC bus tour (green bus thankfully) a few days ago and one of the interesting things I saw was the Hearst Tower on w. 57th st. It was the first skyscraper to break ground post 9/11. According to Wikipedia: