air pollution (IMAGE) University of California - San Diego Caption Exposure to ambient air pollution, such as car exhaust, has been linked to a higher risk of developing dementia; genetics can heighten the risk. Credit IQAir Usage Restrictions Use photo credit License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.