“@BeijingAir: 09-04-2014 08:00; PM2.5; 81.0; 164; Unhealthy (at 24-hour exposure at this level)”... Woohoo! Climbing! #china #pollution
09-04-2014 08:00; PM2.5; 81.0; 164; Unhealthy (at 24-hour exposure at this level)
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