The entire continental US is covered by smoke plumes and there are spots in the northwest that are absurdly toxic, do NOT go outside there. For reference, "hazardous" starts at an AQI of 300. fire.airnow.gov
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The measure isn't exactly the same but those numbers have me thinking about what the guy responsible for mitigating the biggest source of PM10 pollution in the US for decades told me a few years ago. authory.com/DaveLevitan/...
