AdvertisementChildhood Exposure To Lead Can Blunt IQ For Decades, Study SuggestsMarch 28, 2017Rae Ellen BichellfacebookEmailState and federal policies now limit the use of lead in gasoline, paint and plumbing, but children can still ingest the metal through contaminated soil. The effects of even fairly small amounts can be long-lasting, the evidence suggests. (Getty Images/iStockphoto)