Manganese in water can harm kids' IQ: study
http://www.metronews.ca/ottawa/canada/article/639540--manganese-in-water-can-harm-kids-iq-study
http://www.metronews.ca/ottawa/canada/article/639540--manganese-in-water-can-harm-kids-iq-study
"Children whose drinking water contains high concentrations of manganese appear to have lower IQ scores on average than children not exposed to the metallic element, researchers have found."
