Thanks for the information. So they have no proof of causality with -air- pollution, as there are other sources of metal nanoparticles, white paint contains t

Thanks for the information. So they have no proof of causality with -air- pollution, as there are other sources of metal nanoparticles, white paint contains titanium, most cosmetics contain nanoparticles, even tap water. In the Guardian article they also write that: "air pollution increases rates of neurodegenerative diseases" and "186 young people from Mexico City who had died suddenly" What is the relation between those two statements? Neurodegenerative means a slow disease, usually striking older people, not sudden death of young people?