HK's worst smog of 2014 was today. PM2.5 at 128. In SH, 128 is a pretty good AQI day. via @SCMP_News : http://sc.mp/k1xko
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@weirdhongkong@rob_schmitz@SCMP_News Still, 180 seems almost nutritious.Thanks. Twitter will use this to make your timeline better. UndoUndo
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