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  "path": "/news/2026-06-air-pollution-brain-encyclopedia.html",
  "publishedAt": "2026-06-03T16:20:01.000Z",
  "site": "https://medicalxpress.com",
  "textContent": "A new study by researchers at UC Davis Health and Kaiser Permanente found that higher exposure to very small air pollution particles (PM2.5) over a 17-year span was associated with lower semantic memory. Semantic memory acts like the brain's \"encyclopedia\" for things like facts, words and long-term general knowledge.",
  "title": "Air pollution may be harming your brain's 'encyclopedia'"
}