Lithium is linked to all sorts of behavioral changes though. Who knows what microdosing the entire population would do? I really don't think it's fair to describe opposition to this sort of project as arising from "quacks".
I used to see people rant about 'chemicals in the water changing our behavor' and think insanity. Now I am somewhat relieved I have a private well on a secluded aquifier. Just a byproduct of rural life, overblown I am sure, but it puts the mind at ease when I read this kind of thing. PSA: suppliment floride if on a well, your otc toothpaste is not enough.
