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[All-In-1-Min] 【整理】2009-05-08 VOA Video News

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Built in the 1930s during the Great Depression, the 102-story Empire State building is a giant arch deco structure made of concrete. Inside are offices, restaurants and plenty of tourists who come for the breath-taking views of the Manhattan skyline. Empire State - is what - - to – on the massive four-year project to reduce its carbon footprint and energy consumption. The - - undergo a series of renovations, including replacing all of the skyscraper’s sixty-five hundred windows with insulated glass that will reduce heat in the summer and trapped in the winter. Extra insulation will also be installed behind radiates to save heat. Other plans include installing energy efficient lighting upgrading the building control systems to make them more energy efficient and adding modern air-condition in heating systems whose output adjust with usage.
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