![Map of AQI across the USA during California fires](https://www.extremetech.com/wp-content/uploads/2018/11/Map-of-AQI-across-the-USA-during-California-fires-300x166.jpg)
Air quality crises come and go, but at one time or another, you'll probably run into a situation where your phone or your weather forecast will start warning you about outdoor activity. We dig into how is it measured, and what a high AQI really means.
The post How Air Quality and the AQI Are Measured appeared first on ExtremeTech.
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