IIRC archaeologists have determined that wealthier (ancient) Roman citizens had higher lead in their bones than the poor. At one time tomatoes were considered poison partly because people used pewter plates and flatware and the acid in the tomatoes released lead.

Lead poisoning is one of the reasons that the poor don't do as well in school as wealthier students. Poor are more like to live in residences with lead paint.

Lead abatement is important at indoor ranges.

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Luke 22:36