Does the mental illness promote smoking or the smoking promote mental illness? I suspect there is some of each. Certainly many more heavy users and stronger weed than back in the day.
Well, the piece cites a study that claims that “many as 30% of cases of schizophrenia among men aged 21-30 might have been prevented by averting cannabis use disorder.”
I do not make that claim, but it strikes me as a reasonable hypothesis.