Editing Smog (section)

===Alzheimer risk===
Tiny magnetic particles from air pollution have for the first time been discovered to be lodged in human brains– and researchers think they could be a possible cause of Alzheimer's disease.
Researchers at Lancaster University found abundant [[magnetite]] [[nanoparticle]]s in the brain tissue from 37 individuals aged three to 92-years-old who lived in Mexico City and Manchester. This strongly magnetic mineral is toxic and has been implicated in the production of reactive oxygen species (free radicals) in the human brain, which is associated with neurodegenerative diseases including Alzheimer's disease.<ref>{{cite web|url=http://www.lancaster.ac.uk/news/articles/2016/toxic-air-pollution-nanoparticles-discovered-in-the-human-brain/|title=Toxic air pollution nanoparticles discovered in the human brain|date=5 September 2016|publisher=Lancaster University}}</ref><ref>{{cite web|last=Reuben|first=Aaron|title=The terrifying truth about air pollution and dementia|url=https://www.motherjones.com/environment/2015/06/air-pollution-dementia-alzheimers-brain/|date=24 June 2015|website=Mother Jones|language=en-US}}</ref>