Living near busy roads raises dementia risk
People who live near roads laden with heavy traffic have a higher risk of developing dementia than those living further away, possibly because pollutants enter their brains via the blood stream, according to researchers in Canada.

A study in The Lancet medical journal found that people who lived within 50 metres of busy roads had a 7% higher chance of developing dementia compared to those who lived 200 metres away from high-traffic roadways....

http://health.economictimes.indiatimes.com/news/industry/living-near-busy-roads-raises-dementia-risk/56368069
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