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homebrewertoday at 3:36 PM0 repliesview on HN

I doubt it, maybe in rich countries where the air is already pretty good. There are enough places out there (mine included) where you can see and feel air pollution without using any sensors: limited visibility on the order of a few dozen meters, smell of burning coal and rubber tires in the air, windows blackened by soot. Everybody knows how terrible the air is, talks about it daily, and can't actually do anything about it.

I've been advocating for closed windows and increased use of air purifiers and FFP3/N99 respirators, and had some limited success among people I know. People are often easily convinced once they see the state of their filter or respirator after a few days of use.