@BeijingAir About 36 hours of 'good' air quality? That doesn't seem to happen very often.
11-28-2013 09:00; PM2.5; 10.0; 42; Good (at 24-hour exposure at this level)
-
-
Thanks. Twitter will use this to make your timeline better. UndoUndo
-
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.