Gotta control for age. Even if air pollution is a major cause of dementia, the disease takes decades to appear. Utah has the highest birth rate and therefore t

Gotta control for age. Even if air pollution is a major cause of dementia, the disease takes decades to appear. Utah has the highest birth rate and therefore the youngest population of the 50 states (median age 31.5 years). Florida is not the oldest state, but it's near the top (median age 42.7 years).