http://www.youtube.com/watch?v=p2hhNC1nzls … "@BeijingAir 10-08-2012 22:00; PM2.5; 347.0; 397; Hazardous (at 24-hour exposure at this level)"
10-08-2012 22:00; PM2.5; 347.0; 397; Hazardous (at 24-hour exposure at this level)
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