Living near Major Traffic Linked to Higher Dementia Risk (image) Public Health Ontario Share Print E-Mail Caption A study of over 6.5 million Ontario residents raises public health concerns about the impact of air pollution and noise. Credit Public Health Ontario and the Institute for Clinical Evaluative Sciences Usage Restrictions Please credit PHO and ICES when using. Share Print E-Mail 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.