Another Nail in My Heart?

The finding of billions of iron-rich particles in heart tissues (of deceased individuals?) is yet another indication of the damage done to humans by the air pollution generated by cars in our cities
(https://www.theguardian.com/society/2019/jul/12/billions-of-air-pollution-particles-found-in-hearts-of-city-dwellers). I seem to remember, not too long ago, that officials in London sat on an air pollution report that indicated the level of risk in pupils (children are a group that are strongly impaired by air pollution) attending schools in the area. Even limiting petrol and diesel fuelled vehicles from driving in such areas may be insufficient to generate a healthy environment as the tyres and braking systems of cars also generate clouds of nanoparticles.