At first I thought what I was seeing here was a sandstorm rolling in. But according to the US Embassy's air quality monitor, the AQI PM 2.5 went from 69 at 4 pm to 327 at 6 pm. This series of pictures show a view of the West side of Beijing (Tsinghua University) and were taken between 3:40 and 4:00 pm. Given that the Embassy is on the East side of town, it makes sense that this smog would take a couple of hours to register over there.

#airpocalypse   #pollution   #beijingair  
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