e children showed symptoms of being easily distracted, hyperactivity and impulsiveness.
“We treated them for ADHD but I really think the actual problem was the lead,” Chesnut said. “The proportion of kids in that school system, the Picher-Cardin school system, versus the proportion of kids in, let's say, the Tulsa school system, was significantly higher. It wasn't just coincidence.”
Chesnut began routinely checking children's blood-lead levels in 1993.
“The lab came back on the kids that we drew (blood from); probably 90 percent of them had elevated lead levels.”