Yahoo13d
Is the Air Quality Index enough? What the AQI can — and can't — tell you about how healthy the atmosphere is.
The AQI is measured on a scale from 0 to 500, with the lower the number, the healthier the air. (Getty Creative) ...
Houston Public Media12d
Is the air quality index actually useful right now?
The air has improved in the LA region as firefighters get blazes under control, but there are questions about how safe the ...