There's a lot of interesting confounding factors from an air quality perspective...

		gausswho 4 months ago \| parent \| context \| favorite \| on: Air pollution directly linked to increased dementi... There's a lot of interesting confounding factors from an air quality perspective wrt urban vs suburban vs rural. Leaf / lawn blowers. Driving vs walking/public transit. Ground level vs up high. Tradewinds (west coast vs east coast vs AZ dust storm / wildfires).