LOS ANGELES (KABC) -- It's no secret traffic in L.A. is miserable, but could it also be harmful for your brain?
The American Academy of Neurology reports in a recent study that an association was found between smog and dementia.
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Scientists say people exposed more often to traffic-related air pollution are more likely to have high levels of a particular plaque in their brains that has long been associated with Alzheimer's disease.
They stress this is only an association and not proof of their findings.
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"These results add to the evidence that fine particulate matter from traffic-related air pollution affects the amount of amyloid plaque in the brain," said study author Anke Huels. "More research is needed to investigate the mechanisms behind this link."