We map how fine particulate pollution reaches the brain, weakens the blood-brain barrier, and fuels neuroinflammation and oxidative stress that speed cognitive decline. Then we lay out practical steps—AQI checks, HEPA filters, smarter routes, and advocacy—to cut exposure and protect memory.• PM2.5 defined and sources outdoors and indoors• Blood-brain barrier pathways and olfactory route• Oxidative stress and persistent neuroinflammation explained• White matter integrity and cognitive slowdown• Lancet Commission recognition and risk magnitude• High-exposure daily scenarios for commuters and cooks• AQI apps and activity timing adjustments• HEPA filtration, ventilation strategy, and source control• Route choices, distance from traffic, and trees• Community actions, transit choices, and policy advocacyOkay, so we have a challenge for you, the listener, this week. Check your local air quality forecast once a day for the next three days and adjust one single activity based on what you see.This podcast is created by Ai for educational and entertainment purposes only and does not constitute professional medical or health advice. Please talk to your healthcare team for medical advice. Never miss an episode—subscribe on your favorite podcast app!

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