British researchers say data from more than 29 million people across four continents strengthens the evidence of a link between air pollution and dementia.

New research links air pollution to dementia risk. Tiny particles can harm the brain. Pollution may cause cognitive decline, especially in older adult

Long-term exposure to outdoor air pollution, including car exhaust emissions, can be linked to an increased risk of dementia, according to a large-scale study. The Medical Research Council (MRC) Epidemiology Unit and University of Cambridge researchers said there was an "urgent need" for interventions to combat air pollution.

A large study shows that long-term exposure to air pollution, especially PM2.5, nitrogen dioxide and soot, can raise the risk of dementia. Experts urge stricter pollution controls and better global policies.

About 57 million people worldwide have dementia, which occurs when nerve cells’ connections in the brain are lost or damaged. Scientists have identified a handful of risk factor