“A study published in the May issue of the journal Psychological Medicine found cannabis use disorder was linked to about 30 percent of schizophrenia diagnoses in young Danish men in the year 2021.”
...The primary problem with the current available cannabis in dispensaries in Colorado is that the THC content is not like it used to be. Prior to the 1990s it was less than 2%. In the 1990s it grew to 4%, and between 1995 and 2015 there has been a 212% increase in THC content in the marijuana flower...