Air Quality Index (Aqi)

Is the Air Quality Index enough? What the AQI can — and can't — tell you about how healthy the atmosphere is.

Add Yahoo as a preferred source to see more of our stories on Google. The AQI is measured on a scale from 0 to 500, with the lower the number, the healthier the air. (Getty Creative) (BlackSalmon via ...

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Is the Air Quality Index enough? What the AQI can — and can't — tell you about how healthy the atmosphere is.

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