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Lead Exposure May Have Lowered The IQ of Half of Americans Since 1940

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Childhood lead exposure in the United States is ubiquitous and much more concerning than previous estimates have suggested, according to a new study. When researchers analyzed leaded gas use from 1940 and combined it with data on blood-lead levels from the mid 1970s, they found more than 54 percent of Americans alive in 2015 had … Read more

IQ of over half of the US population may have been lowered by leaded petrol

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Exposure to leaded petrol as a child has been linked to an average IQ drop of 2.6 points among US adults, increasing to 5.9 points among those born in the mid-to-late 1960s Health 7 March 2022 By Clare Wilson Fumes from cars using leaded petrol may affect IQ PictureLux/The Hollywood Archive/Alamy More than half of … Read more