There are some things about lead that are not in dispute:
1. that lead causes brain damage;
2. that the effect of lead exposure is the same whether it is ingested, absorbed or inhaled;
3. and for children, there is no safe level of lead in blood – any lead will cause some toxic effect.
Lead is just not good for human bodies. Howard Mielke, an expert in lead poisoning at Tulane University School of Medicine, noted that lead typically affects the prefrontal cortex of the brain — the section that controls decision-making and compulsive behavior. Not surprisingly then, lead poisoning has been tied to everything from higher crime rates and lower test scores to attention deficit hyperactivity disorder and autism.
Lead that accumulates in the bones of a child can also seep back into the blood stream later on in life as bones deteriorate, Mielke said. This can lead…
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