(you mean high poverty areas correlated with lead concentration, right?)
My first guess would not be that lead causes poverty (is that what you are suggesting?), but that lead-producing activities (highways, factories, waste dumps) tend to be undesirable, and tend to be placed in poorer neighborhoods because poor people have less political power.
My first guess would not be that lead causes poverty (is that what you are suggesting?), but that lead-producing activities (highways, factories, waste dumps) tend to be undesirable, and tend to be placed in poorer neighborhoods because poor people have less political power.