Air Pollution Seems to Cause Dementia
As far as anecdotes go, since I moved to London I noticed a sharp decrease in memory performance, heavy hair loss, and a general feeling of unhealthiness, developed a random persistent cough as well. The fact that you can always see a heavy haze even in short tube tunnels tells a lot on the air quality, the last underground cleaning train stopped working in the eighties...very unhealthy place to live/work in my opinion.