There are numerous scientifically validated ways to support brain health and avoid cognitive decline. Like eating blueberries, take regular walks, getting decent sleep and controlling stress. And you might be doing all of them. But every day, you’re breathing in microscopic pollution particles, known as particulate matter, that can enter the brain, bypassing the blood-brain barrier via the olfactory nerve (nose to brain) or by crossing from the lungs into the bloodstream. That’s especially concerning since studies have consistently linked these tiny particles to neurological conditions, such as Alzheimer’s and Parkinsons’s. But before you throw up your hands, wondering what…

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