@BeijingAir: 11-10-2013 13:00; PM2.5; 6.0; 25; Good (at 24-hour exposure at this level) >> the healthiest day in my 3.5 years! Yihaaa!
11-10-2013 13:00; PM2.5; 6.0; 25; Good (at 24-hour exposure at this level)
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