this post was submitted on 07 Apr 2022
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[โ€“] [email protected] 0 points 2 years ago (1 children)

I starting wearing N95 masks years before Covid-19 reared up. The air being under AQI100 is a rarity where I live and +400 not unheard of.

[โ€“] [email protected] 1 points 2 years ago

Those are some rough numbers, is it from industrial impact something else?