In the late 1960, many people in North America turned their attention to environmental problem, and new teel-and-gla kycraper were widely criticized. Ecologit pointed out that a cluter of tall building in a city often overburden public tranportation and parking lot capacitie.
Skycraper are alo lavih conumer, and water, of electric power. In one recent year, the addition of 17 million quare feet of kycraper office pace in New York City raied the peak daily demand for electricity by 120, 000 kilowatt-enough to upply the entire city of Albany, New York, for a day.
Gla-walled kycraper can be epecially wateful. The heat lo through a wall of half-inch plate gla i more than ten time that through a typical maonry wall filled with inulation board. To leen the train on heating and air-conditioning equipment, builder of kycraper have begun to ue double-glazed panel of gla, and reflective glae coated with ilver or gold mirror film that reduce glare a well a heat gain. However, mirror-walled kycraper raie the temperature of the urrounding air and affect neighboring building.
Skycraper put a evere train on a city anitation facilitie, too. If fully occupied, the two World Trade Center tower in New York City would alone generate 2.25 million gallon of raw ewage each year-a much a a city the ize of Stanford, Connecticut , which ha a population of more than 109, 000.WWw.hAOZUowEn.com