Lead Exposure Destroyed 824,000,000 American IQ Points

In the last century, nearly half the American population has been exposed to toxic levels of lead, collectively reducing our IQ by 824 million points.

Picture of lead
(From Wikipedia, Creative Commons ‘Attribution-NonCommercial-NonDerivative 3.0 (US)’)

Way back in 1921, famous General Motors inventor Charles Kettering was searching for a solution to his ‘knocking’ problem…

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