@shearwater
I am not lumping all SUVs together and saying every single one is a danger to our lungs. The Mitsubishi PHEV Outlander, a Skoda Kodiaq 1.4 petrol, etc, these are fine vehicles with low emissions and aren't going to give me particulates issues.
However the vast majority of the SUV class of car are diesel, because the torque and grunt offered by those powertrains tend to suit the vehicle. There are five times the number of 4x4s on Autotrader that are diesel compared to petrol.
What I'm saying is, does every purchaser of those diesel vehicles, need the low range torque and grunt to tow a horsebox or farm vehicle? Of course not. They don't even need it to get off their drive in snow or mount the kerb at the school.
It's become a defensive choice due to purchasing power and nothing else. The belief that "I can see high up, I'll be better off in a crash, no other vehicle will take my son's footie equipment, we have three DCs" etc... the emissions implication is immediately subsumed by these other "needs" and any other class of vehicle such as a MPV, estate etc, is relegated immediately