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is common and popular in the country. is a demonstration project and costs the city government 1.5 million dollars. will make the ordinary cooling down of the city in summer unnecessary. aims at getting people involved and understanding their impact on the environment.
It was built ninety years ago and is the most outstanding feature in the center of the city. It is originally proper to build a garden on the top of the City Hall. The temperature on its top is a little bit higher than that on the street below. It is the first building in America to have a garden on it.
Because the City Hall is large. Because the mayor had urged the environmental department to do so. Because it can make people understand their impact on environment better through a public building. Because the experts just want to make the City Hall a convenient laboratory.
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