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Real estate tycoon measures PM2.5 in Shanghai metro (8/10)

2014-01-09 16:13 Ecns.cn Web Editor:Gu Liping
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Pan Shiyi, a real estate tycoon, measures PM2.5 using a device in a metro station of Shanghai on Jan 9, 2014. Pan said the concentrations of PM2.5 in 14 spots selected from Shanghai subway were from 36 to 54 micrograms per cubic meter. [Photo: China News Service / Pan Suofei]

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