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Pan Shiyi tests PM 2.5 on Shanghai subway

Updated: 2014-01-10 11:34 (chinadaily.com.cn)
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Pan Shiyi tests PM 2.5 on Shanghai subway

Pan Shiyi, chairman of Soho China, uses a PM2.5 density monitor at a Shanghai subway on Jan 9, 2014. [Photo/icpress.cn]

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