Pretty tiny amounts of lead are damaging to young children, like age 0-6. It causes neurological damage, decreasing IQ and attention span; increasing aggressio

Pretty tiny amounts of lead are damaging to young children, like age 0-6. It causes neurological damage, decreasing IQ and attention span; increasing aggression. It is such a pervasive effect that researchers find very strong correlation between the phaseout of lead in paint and fuel and decrease in crime 20 years later.