Beijing Air: 493 Hazardous

Today we have pretty much the worst air quality possible; here's the view from my office window. The AQI scale only goes to 500; the average for the day is 500. (Bellevue, WA's AQI today is 10, by comparison.)

You can really visibly see the difference between the various scores:

• 74: Moderate
• 129: Unhealthy for sensitive groups
• 182: Unhealthy
• 213: Very unhealthy

Source: US Embassy AQI Twitter Feed.

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