九州北部の青空が最近汚いのはこのせいの可能性大です。 RT @BeijingAir 09-22-2012 08:00; PM2.5; 157.0; 207; Very Unhealthy (at 24-hour exposure at this level)
09-22-2012 08:00; PM2.5; 157.0; 207; Very Unhealthy (at 24-hour exposure at this level)
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