So, you know, just to put this in context for the audience, a kid loses an IQ point, mom doesn't notice, PD notice, teacher doesn't notice. No offense. You know, Back in the 1980s, we got leaded gasoline out of the gasoline. And as a direct result from that, the national average IQ went up two points. And I remember talking to an epidemiologist at that time, and he said, you could lose five IQ points across an entire population and nobody would notice. (25:42–25:55)
CLAIM
Asserts that removing lead from gasoline increased the national average IQ by two points.
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