Sir @velimir , Thank you this post.

Imagine how much better off we would be if the first car was designed to run on electricity, instead of gasoline. But back then who could have predicted the scale of the pollution, the global warming.

I think it's a serious problem right now.
Air Pollution due to Vehicle Smoke. So that the Human respiratory system is disturbed, The ozone layer is getting thinner and disturbed The process of photosynthesis of plants.