[lonelyasacloud]

The study was on those over 65, so in terms of London smog and India; life expectancies lower so maybe if data available similar signals might be very difficult/impossible to detect.

> Or into the future with high EV cities and a drop in PM2.5?

We can hope but - tire wear produces similar sized micro plastic pollution [0] and electric cars are heavier and are likely to produce more of them [1]. Add into mix that chemically different make up and who knows [2]

[0] e.g. https://www.theguardian.com/environment/2022/jun/03/car-tyre... [2]

[1] https://www.sciencedirect.com/science/article/abs/pii/S13522...

[2] e.g https://newatlas.com/environment/tire-particles-swimming-abn...