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Hello, I'm the host of the blog you're visiting now. Thank you for your presence. I've been working as a teacher of English since ten years ago. Hope we'll be friends.

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奥风英语群听写文章[慢速]我的屋顶花园有多绿How Green Is My (Rooftop) Garden?  

2008-10-23 09:55:29|  分类: 奥风英语互动阅读 |  标签: |举报 |字号 订阅

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This is the VOA Special English Development Report.

Green roofs are designed to save energy and capture rainwater. Rooftops covered with plants help keep buildings cool. They can extend the life of a roof. And they can reduce water runoff into streets and storm water systems.

Chicago City Hall
Chicago City Hall
Several years ago, the mayor of Chicago, Illinois, visited Germany, a leader in green roof design. Mayor Richard Daley later decided ________  ________  ________ ________ on Chicago City Hall. Today, the tops of many other buildings also look like parks.

In Canada, the Coast Plaza Hotel in Vancouver has a ________ on its roof.

Experts say green roofs usually do not get much above twenty-seven degrees Celsius. So ________ ________ ________ be a problem for growing. But rooftop gardeners have to be careful not to put too much weight on the roof. This is true ________ ________ ________ ________ ________ ________ ________  ________.

New York City has an ________ ________ farm for hydroponics. The farm is on a boat called the Science Barge. ________ and ________ river water are used to grow ________, ________, ________ and ________. The farm shows the possibilities for ________ ________ ________.

Earlier this year, researchers in Texas reported that green roofs can ________ a building's air ________ costs by about one-fifth ________ to black-top roofs. But they also reported that not all green roofs ________ ________ well. They found that designs ________ in their ability to ________ ________ ________ and to ________ ________.

Mark Simmons led the study for the Lady Bird Johnson Wildflower Center at the University of Texas at Austin. "Green roofs have to be done right," he says. For example, he says, "Just having a green roof may not mean anything in terms of ________ ________  ________ ________ the street level."

The team put ________ roofs on top of ________ ________boxes, to________ green roof conditions. The study compared products from six companies. The researchers say they want to help businesses ________ ________ to ________ their designs.

Each rooftop had ________ different kinds of plants native to Texas. The researchers say the presence of native plants likely helped all the green roofs capture water better compared to sedums. Sedums are plants that need little water and often are used on green roofs.

The native plants could take in more water and ________ more of it to the ________.

And that's the VOA Special English Development Report, written by Jerilyn Watson.

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