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science.solidot.org/article.pl - Cached
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北京的烟雾浓度超过世界卫生组织安全标准5倍）。北京还是周边工业城市的受害者，它被煤炭业、钢铁业、水泥业和其他重污染工业包围着。天津的工厂关闭日期是从7月25日到9月30日，即残疾人奥运会结束之后。此外中国的钢铁中心唐山，离北京90英里，也下令临时关闭267家企业。
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