5. According to the passage, we can learn that

　　A. only the rich people can live in a "green" house

　　B. "green" houses can help us improve our quality of life

　　C. everything in "green” houses is green in colour

　　D. fewer people concern the environment

　　C

　　Macomb. "I don't think such a business exists yet, but theoretically（理论上） it's very possible. And companies are moving in this direction."

　　So, scientists are now looking for new ways to make fabrics for clothes that are good both for your image and for Earth.

　　In the past few years, textile scientist Yiqi Yang of the University of Nebraska in Lincoln has figured out how to make yarn out of cornhusks, chicken feathers, and rice straw (part of the rice plant). All three are agricultural by-products that usually end up in the trash.

　　"We already have a problem with how to get rid of these waste products," Yang says. "Instead, let's use them to make beautiful materials."

　　The process involves chemical reactions that break down the raw materials into fibers（光纤）, followed by cleaning. The scientists then spin the fibers into yarn（纱线）, which they use to make fabrics.

　　⑦Clothes made from farm waste are still years away from hitting the stores, but clothes made from organic or recycled fabrics and products made from coconut, bamboo, and corn sugar are already available in many places.

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