> missing the fact that the human lungs are something like twice as effective and powerful as the "need" to be at sea level on average, but you can get a popul

> missing the fact that the human lungs are something like twice as effective and powerful as the "need" to be at sea level on average, but you can get a population effect from "some small portion of the population has smaller or disease compromised lungs or just sleep apnea, and THOSE people commit suicide at a higher rate at high altitude". The "our lungs are big enough" only works if you control for the cases where they aren't. I'd hoped that things like genetic screening would uncover that some cases where studies showing that eating/avoiding Foo has a small positive or negative effect turns out to actually be an enormous effect in a small sub-population... but so far we don't appear to have identified too many of those.