[zosima]

People who are poorer and have worse health are predisposed to live in cheaper dwellings, many of which are closer to roads and thus more noisy and with more air pollution.

People who are poorer and have worse health, also have an increased incidence of dementia, seemingly independently of the number of particles in their dwellings.

[Insanity]

I’m not sure this is a completely valid statement. Take Ontario - the most expensive places to live are in Toronto with the most traffic, the cheapest places are more rural without that heavy traffic and thus less pollution.