Eric Bjerregaard, Here's an example.  Chlorpyrifos is one of the most commonly applied organophosphate pesticides used in the US, with about 10 million pounds used annually.  Recent studies of chlorpyrifos show delays in mental development in infants, attention problems and autism spectrum disorder in early childhood, and intelligence decrements in school age children.
file:///C:/Users/User/Downloads/EPA-HQ-OPP-2015-0653-0454%20(1).pdf