Is the air you breathe silently fueling dementia? A 29-million-person study says yes

Air pollution isn't just bad for your lungs—it may be eroding your brain. In a sweeping review covering nearly 30 million people, researchers found that common pollutants like PM2.5, nitrogen dioxide, and soot are all linked to a significantly higher risk of dementia. The most dangerous? PM2.5—tiny particles from traffic and industry that can lodge deep in your lungs and reach your brain.

source https://www.sciencedaily.com/releases/2025/07/250726234404.htm