CHINA-SHANGHAI-PM 2.5 (CN)
Updated: 2012-12-27 16:01
(Xinhua News Agency)
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SHANGHAI, June 27, 2012 (Xinhua) -- The devices are seen at a PM2.5 monitoring data pilot release point in Shanghai, east China, June 27, 2012. Shanghai began to publish the city's average PM 2.5 concentration from Wednesday. (Xinhua/Pei Xin)??