Oh please. I live in a 'developing country' (don't like that term because I have doubts that it's actually developing). A substantial portion of the population lives in houses heated with coal furnaces. Except that for the past few years coal prices went up somewhat and many people went to burning trash: rubber tires, old rags soaked in motor oil, pieces of bitumen, old plastic bottles, you name it.

In winter air quality is simply horrible (my Grafana instance shows an average of 240 µg/m³ PM2.5 for January of this year). I have a t-shirt that was hung out to try at the beginning of this year and it still smells of burnt coal and rubber.

The government spent a pretty penny subsidizing installation of natural gas furnaces. Guess what, almost nobody is actually using that now since coal is noticeably cheaper, so people went right back to burning it. I understand they don't care about anybody else, but in winter their own kids breathe air that is literally black and reduces visibility to a few dozen meters. Good luck trying to convince them of anything.