Correct me if I am wrong, but I thought the global lead poisoning hypothesis that was popularized by Neil DeGrasse Tyson's remake of Cosmos was determined to be based on extremely scant evidence and may have been outright false
A recent study in New Zealand found that blood lead levels of 3.5 micrograms / dL, which is the lowest easily detectable level, were associated with a drop of 1 IQ. People during the times of lead paint and leaded gasoline often had levels of 80 micrograms / dL. It seriously messed them up.
Our first version of the site was PFAS.wtf but that didn't test well