The Secret Life of Lead, part 1

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Living on Earth's hour-long documentary "The Secret Life of Lead" opens with host Steve Curwood visiting the neighborhood around researcher Kim Dietrich's office. Dr. Dietrich has been following almost 300 young men and women there for the past two decades in an attempt to unravel the effects of childhood lead exposure. Most recently, his research has shown that lead exposure can lead to an increase in juvenile delinquency.