I live near Phoenix part of the year and visit malls. There, I seldom see a mom pushing or walking with a Down Syndrome child.
OTOH, I go to my home town in Iowa and see in the local mall, never less than 3-6 such afflicted people. This in an area of ~ 60,000 folks.
My sister says it is because the people of AZ are ashamed to parade their DS kids.
I hardly think so!
And this has exactly what to do with elevated nitrates and pesticide levels in the Sandhill's ground water?
Are you implying those Arizona mothers went to Nebraska and drank the water while pregnant?