Air Pollution Linked to Increased Dementia Risk: A Meta-Analysis

A new study published in The Lancet Planetary Health reveals a significant link between long-term exposure to air pollution (PM2.5, nitrogen dioxide, and soot) and an increased risk of dementia. A meta-analysis of data from over 29 million participants found that for every 10 μg/m³ increase in PM2.5, the relative risk of dementia increased by 17%; for every 10 μg/m³ increase in nitrogen dioxide, the risk increased by 3%; and for each 1 μg/m³ increase in soot, the risk increased by 13%. The research highlights the importance of air pollution control for public health and calls for an interdisciplinary approach involving urban planning, transport policy, and environmental regulation to prevent dementia.