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  3. What have made people certain of the purity of bottled water? According to estimates,what is the recycle rate of water bottles?

What have made people certain of the purity of bottled water? According to estimates,what is the recycle rate of water bottles?

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问题 What have made people certain of the purity of bottled water?
According to estimates,what is the recycle rate of water bottles?
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答案Fewer than 20 percent．
解析 根据题干中的according to estimates定位到原文最后一段第三句Yet fewer than 20 percent of them ever make to a second life, according to estimates by the Container Recycling Institute．题目问的是，据估计，瓶装水包装的回收率是多少。原文最后一段第三句提到，据容器循环再造研究所估计，只有不到20%的瓶装水包装成功得到二次利用。题干中的the recycle rate意为回收串，recycle与原文中的make it to a second life相对应，故答案为fewer than 20 percent。
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