Sunday is a day for mostly poor air quality in Beijing, although in the evening hours we should begin to see the clearing effect that will give us good air on Monday. At midnight, the PM2.5 levels should be in the high range of Unhealthy for Sensitive Groups or the low range of Unhealthy . Look for PM2.5 levels to increase throughout the morning and afternoon, likely into the Very Unhealthy range. Pollution levels should begin to drop after 6PM, and we should at least move into Unhealthy for Sensitive Groups before midnight. There is also a slight chance that we will see pollution levels drop to Moderate or Good before midnight. The clearing should continue into Monday when we will likely see Good to Moderate air quality the entire day.
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