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on the bright side, I get to smoke for free
(discuss.tchncs.de)
image description:
image of a person happy-crying with the text: me when my city's AQI is "unhealthy" and not "dangerous"
on the bottom is a screenshot of a weather app showing AQI of 110 and labeled unhealthy
I think the O3 ozone is a byproduct of combustion at high temperatures and not ideal combustion ratios. But I don't know a whole lot about it.
Ozone if formed usually when UV rays hit Oxygen(O2), and if forms protective ozone layer high up in atmosphere. But ground level ozone like this are formed from other pollutants in the presence of sunlight. That is factory and vehicle's pollutants react on sunlight and creates ozone which is harmful