I observe that the vast majority of people are not worried about these things. Some of them do talk about it, but do not make even simple changes to their lives

I observe that the vast majority of people are not worried about these things. Some of them do talk about it, but do not make even simple changes to their lives that would reduce their impact. (Single most important impact anyone can make: stop buying stuff you don't actually need.) In my area smog and air quality from exhaust is not a concern. I don't worry myself with climate change because it is not only inevitable, but an inevitable part of living on earth. We can try to shift and reduce our impacts, but we cannot eliminate them, and at any rate it's much too late for the CO2-caused climate change concerns. My buying one more ICE car does not matter. It doesn't affect my consumption behavior or that of most other people.