#Students: @BeijingAir: 03-11-2014 12:00; PM2.5; 272.0; 322; Hazardous (at 24-hour exposure at this level). How will you create a solution?
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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Sitting beside an air purifier and choking. "
@BeijingAir 03-11-2014 12:00; PM2.5; 272.0; 322; Hazardous (at 24-hour exposure at this level)"Thanks. Twitter will use this to make your timeline better. UndoUndo
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