University College London Apr 7 2025 Long-term exposure to high levels of air pollution may harm the brain health of older adults in England, finds a new study led by UCL researchers. The research, published in The Journals of Gerontology: Series A , found that exposure to nitrogen dioxide (NO₂) and fine particulate matter (PM 2.5 ) is linked to lower scores in key cognitive abilities, particularly language skills. NO₂ mainly enters the atmosphere through fuel combustion, originating from