"Lead is a common element but is found in old paints (including those once used on children's toys), soil, old piping, water, and the atmosphere from lead-containing vehicular fuels, even drinking vessels. At high dose it is lethal but also causes seemingly trivial symptoms such as headaches. However, in children lead can also lead to irreversible damage to the organs, the kidneys in particular, and the nervous system including the brain. Early detection to contaminated sources is important to prevent children coming to harm but exposure is not always apparent. The effects of high lead exposure amongst children can result in 'learning disabilities', behavioral problems, lowered intelligence, stunted growth, and hearing impairment....
"Published research shows that lead exposure and criminality is linked to evidence of poorer intelligence, low communication skills, and behavioral problems, such as vandalism and bullying," Miller adds. Other studies have found delinquent juveniles to have raised concentration of lead in their bones compared to that in "non-delinquent" juveniles."
http://medicalxpress.com/news/2013-02-poisoning-juvenile-crime.html
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