Alcohol is more likely than marijuana to interact with other drugs.
I misinterpreted the conclusion of your points, but I don't think that invalidates my criticism.
Public health researchers have said studying rates of injuries, accidents, mental illness and teen use in the wake of the new laws will lead to a better understanding of marijuana's public health effects.
A suggests that consuming weed as a teenager can lead to brain development issues at a later stage.
You can find a list of the topics and their respective megathreads in a post on the top of the sub.
Still, combining the two appears to have the worst results.