Tuesday should repeat our now-familiar story of PM2.5 levels for the early Beijing summer: high levels in the morning followed by better air in the afternoon. Expect to see Unhealthy and Very Unhealthy air in the morning followed by decreasing levels in the late morning. We should make it into Unhealthy for Sensitive Groups , and there is a decent chance of dropping into Moderate . Expect increasing PM2.5 levels in the evening hours.
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