Lead in gasoline blunted IQ of half the U.S. population, study says
Lead in gasoline blunted IQ of half the U.S. population, study says
www.nbcnews.com Lead from gasoline blunted the IQ of about half the U.S. population, study says
Leaded gas was banned in 1996, but exposure to the poison cost people born before then several IQ points on average, researchers estimated.
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