Actually, the decrease in crime can largely be attributed to the the decrease in atmospheric lead (coming from lead-based gasoline and paint), which was proven

Actually, the decrease in crime can largely be attributed to the the decrease in atmospheric lead (coming from lead-based gasoline and paint), which was proven to interact with children's brain chemistry such that it resulted in hyperactivity and behavioral problems later in life. http://www.motherjones.com/environment/2016/02/lead-exposure-gasoline-crime-increase-children-health http://www.motherjones.com/environment/2016/02/lead-exposure...