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An AQI of 250 plus is equivalent to 7 cigarettes a day:

https://woods.stanford.edu/news/health-impacts-wildfire-smok....

It depends how much time you spend outside? I’m just thinking back to my days in Beijing when 250 PPI was not a bad day.

The parent commenter was referring to camping, therefore all day.

What about an AQI of ~1500? Yeah, we lived through that here 4 years ago during the fires here in Oregon, while waiting to find out if we’d told to evac.

Once the AQI exceeds 300 or so, I would run an air purifier at home (keeping the windows closed) and wear an N95 mask whenever I venture outdoors.

Air filtration works very well for smoke (and other particulates).

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