The effects of vehicular pollution? If sitting in your garage with a running car kills you, obviously being surrounded by traffic all day in the cities we live in must be absolutely terrible for you.
"For older women, breathing air that is heavily polluted by vehicle exhaust and other sources of fine particulates nearly doubles the likelihood of developing dementia, finds a study published Tuesday."
http://www.latimes.com/science/sciencenow/la-sci-sn-air-poll...