I'm diverging here but some of you don't appear to take air pollution too seriously, nor does the current govt.
I'm a severe asthmatic and find walking in cities or large towns difficult, especially when rain is keeping the emissions down. On bad days, my DH has to drop me at our destination and then park. I'm sure I'm not alone in this.
Babies and children in prams/pushchairs are at just the right level to breathe in exhaust fumes.
In France we are required to have a clean air sticker on our cars if driving into certain areas, such as big cities. There are 6 categories, depending upon output of pollutant emissions.
Certain vehicles can be banned, either all the time of when pollution levels, such as caused by pollen, are bad.
My nearest shopping town, population under 2000 has charging points in some parking areas and also at supermarkets. This is quite common.
Finally, there are generous scrappage schemes.