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NBC News NOW

Lead exposure lowered the IQ of about half the U.S. population, study shows

NBC News Clone summarizes the latest on: Lead Exposure Lowered The Iq Of About Half The U S Population Study Shows 134948421762 - Breaking News | NBC News Clone. This article is rewritten and presented in a simplified tone for a better reader experience.

01:40

A recent study shows that inhalation of lead from gasoline lowered the IQ of about half of the U.S. population, with some people born in the 1960s and 70s losing up to seven IQ points. NBC News medical contributor Dr. Natalie Azar has the details. 

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