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There’s the “lead-crime hypothesis” I remember reading about in freakonomics years ago. Not sure if it’s stood the test of time or not, interesting roundup here:https://www.motherjones.com/kevin-drum/2018/02/an-updated-lead-crime-roundup-for-2018/ …
Yes, that's mostly what got me interested in it, but I don't think the people talking about lead poisoning are looking farther than just crime. I believe lead pollution poisoning to be the single greatest destroyer of the human mind ever and that it impacts so much more.
