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Masks become travel essentials as smog lingers

(chinadaily.com.cn) Updated: 2013-01-31 15:39
Masks become travel essentials as smog lingers

Tourists wearing masks visit Tian'anmen Square as the worst smog in decades continued to rise to dangerous levels in Beijing on Jan 23, 2013. [Photo by Wang Wenlan/Asianewsphoto]

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