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托福IBT必背经典文章：摩天大楼与环境

2015-06-03 16:01:52来源：网络

　　【新东方托福IBT必背50篇经典文章：摩天大楼与环境】这份资料可以帮助考生在托福网考备考过程中，提高托福口语水平，同时对提高托福写作水平和托福阅读都有很大帮助。托福IBT必背50篇经典文章，助你托福考试成功!

　　新东方托福IBT必背50篇经典文章：

　　Skyscrapers and Environment

　　In the late 1960's, many people in North America turned their attention to environmental problems, and new steel-and-glass skyscrapers were widely criticized. Ecologists pointed out that a cluster of tall buildings in a city often overburdens public transportation and parking lot capacities.

　　Skyscrapers are also lavish consumers, and wasters, of electric power. In one recent year, the addition of 17 million square feet of skyscraper office space in New York City raised the peak daily demand for electricity by 120, 000 kilowatts-enough to supply the entire city of Albany, New York, for a day.

　　Glass-walled skyscrapers can be especially wasteful. The heat loss (or gain)through a wall of half-inch plate glass is more than ten times that through a typical masonry wall filled with insulation board. To lessen the strain on heating and air-conditioning equipment, builders of skyscrapers have begun to use double-glazed panels of glass, and reflective glasses coated with silver or gold mirror films that reduce glare as well as heat gain. However, mirror-walled skyscrapers raise the temperature of the surrounding air and affect neighboring buildings.

　　Skyscrapers put a severe strain on a city's sanitation facilities, too. If fully occupied, the two World Trade Center towers in New York City would alone generate 2.25 million gallons of raw sewage each year-as much as a city the size of Stanford, Connecticut , which has a population of more than 109, 000.

　　查看全部：新东方托福IBT必背50篇经典文章


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