I know you're making a joke about spurious correlations, but proposing that a link may exist between the reduction in incidence of a neurodegenerative illness a

I know you're making a joke about spurious correlations, but proposing that a link may exist between the reduction in incidence of a neurodegenerative illness and the removal of a substance with proven neurodegenerative effects from the environment is quite reasonable. At the very least, it passes the sniff test for plausibility and it is worth looking into.