Smog May Be Harming Your Brain

April 23, 2015 8:00 PM

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THURSDAY, April 23, 2015 (HealthDay News) -- Long-term exposure to tiny particles of air pollution may be linked to subtle changes in the brain that could lead to thinking and memory problems, a new study suggests.

These fine particles, smaller than 2.5 micrometers in diameter (much smaller than a pinhead), are released by burning wood or coal, car exhaust and other sources. Long-term exposure may shrink the brain and increase the risk of silent strokes, the researchers suggested.

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