Don't know about those, but there is a high positive inverse correlation between tetraethyl lead and the adolescent crime rate.
en.wikipedia.org/wiki/Tetraethyllead#Effect_on_crime_rates
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Although leaded gasoline is largely gone in North America, it has left high concentrations of lead in the soil adjacent to roads that were heavily used prior to its phaseout. Children are particularly at risk if they consume this.[118]
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Don't eat roadside dirt!