mudsticks
Obviously an Aubergine
It's an interesting idea but the other major variable at work is lower population density in rural areas, with fewer people gathering at churches, temples, mosques and sports events.
But yes, I must admit that during the really bad times when I'm sitting in traffic a lot and not cycling much my lungs do get a bit congested thanks to pollution, especially in times of anticyclonic weather when there's no wind to blow away the fumes.
You're not suggesting we're a Godless bunch of heathens down here are you??
Air pollution compromises lung function.. That's a no- brainer surely.
To what degree its affected CV outcomes, is of course still not measurable.
Because of course greater pollution is often in areas of higher population density etc etc.
But we also have a lot of care homes down here too.
It will take a while to process the figures usefully, and in any way conclusively.