August 14, 2013 | USA Today
Scientists have long known that children with high levels of toxic lead in their bloodstream are more likely than others to behave impulsively, have shorter attention spans and lower IQs and do poorly in school.
Research out Tuesday finds that even children with just moderate levels of lead in their first three years of life are nearly three times as likely to be suspended from school by the time they’re 9 or 10 as those whose blood-lead levels were below recent treatment thresholds. [...]