The new World Trade Center in New York, knownÂ colloquiallyÂ as "Freedom Tower", will be opening in 2013 officially as One World Trade Center. The structure, including spire, will stand at a symbolic 1,776 feet representing the birth of the United States. 1 WTC will be the tallest building in the Western Hemisphere and the third-tallest in the world by pinnacle height.Â The new World Trade Center complex will also feature three other high-rise office buildings, located along Greenwich Street, and the National September 11 Memorial & Museum, located just south of One World Trade Center, where the Twin Towers once stood. The construction is part of an effort to memorialize and rebuild following the destruction of the original World Trade Center complex during the attacks of September 11, 2001.
Like the other buildings of the rebuilt World Trade center complex, One World Trade Center includes a number of sustainable architecture features. Much of the building's structure is made from post-industrial recycled materials, and about 80% of its waste products are also being recycled. Although the roof area of any tower is comparatively limited, the building will implement a rainwater collection and recycling scheme for its cooling systems. The building's PureCell phosphoric acid fuel cells will generate 4.8 million watts of power, and waste steam will also help generate electricity. The New York Power Authority selected UTC Power to provide the tower's fuel cell system, which will rank as one of the largest installations of fuel cells in the world once complete. The tower will also make use of off-site hydroelectric and wind power. The windows are made of an ultra-clear glass which allows maximum daylight to pass through, while interior lighting is equipped with dimmers that automatically lower the lights on sunny days, thereby reducing energy costs. Like all of the new facilities at the World Trade Center site, One World Trade Center will be heated by steam, with limited oil or natural gas utilities located on-site.
One World Trade Center is expected to receive a Leadership in Energy and Environmental Design (LEED) Gold Certification, making it one of the most environmentally sustainable buildings of its size in the world.