Presumably there's an epigenetic effect from this i.e. having dumber parents would have negative effects on their children. But over time that should improve wi

Presumably there's an epigenetic effect from this i.e. having dumber parents would have negative effects on their children. But over time that should improve with the removal of lead from the environment. So we can at least take solace in that things ought to get better: > Blood lead data were instrumental in developing policy to eliminate lead from gasoline and in food and soft drink cans. Recent survey data indicate the policy has been even more effective than originally envisioned, with a decline in elevated blood lead levels of more than 70% since the 1970s. https://www.cdc.gov/nchs/nhanes/about_nhanes.htm https://www.cdc.gov/nchs/nhanes/about_nhanes.htm