@BeijingAir how long is this going to last? Beijing is perpetually unfit for human inhabitence...hazardous
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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What happened? The sky just disappeared! RT
@BeijingAir 01-22-2013 15:00; PM2.5; 326.0; 376; Hazardous (at 24-hour exposure at this level)Thanks. Twitter will use this to make your timeline better. UndoUndo
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