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By one estimate, one-third of Black children age 1-5 in large cities with poor parents have hazardous levels of lead in their blood.(40) The Alliance to End Childhood Lead Poisoning estimates that up to 50% of children in poor Black urban areas suffer from lead poisoning.(41) While leaded gasoline, lead solder in soda cans, and new lead paint have all been cut down, other sources of lead persist in urban areas, include old buildings, industrial emissions, old schools and...