At Ground Zero, Rebuilding With Nature in Mind
By ANTHONY DEPALMA
Published: January 20, 2004
At 52 stories, the building will be taller than its predecessor but will have a smaller footprint and less space. It will harvest natural sunlight through floor-to-ceiling windows specially coated to reflect heat and allow plenty of natural light into the building. Rainwater collected on the roof and stored in tanks in the building will be reused in toilets or will flow into the drip irrigation system for a small park that will be built next to the site. The architect designing the park will select hardy plants and trees that need little water.
Mr. Lieber, the project manager, said the environmental features accounted for 3 to 5 percent of the cost of constructing 7 World Trade Center. The total cost of the project, comprising direct and indirect costs, was given in Liberty Bond filings at $540 million. Commercial tenants, not the building's owners, will realize most energy savings, Mr. Lieber said.
The Freedom Tower, which the Tishman company will also build for the Silverstein organization, will incorporate many of the same environmental features as 7 World Trade Center, and a few not put in effect there. For instance, the tower, a much larger building, will be more energy independent because it will have propeller-driven wind turbines proposed by David M. Childs, a partner in the firm of Skidmore, Owings & Merrill who was design architect for 7 World Trade Center. Wind power is to furnish up to 10 percent of the tower's electricity.