>"We provide evidence that regular cannabis use is associated with gray matter volume reduction in the medial temporal cortex, temporal pole, parahippocampal gyrus, insula, and orbitofrontal cortex;"

Yet another study that shows this. But what use do these studies have in a world where legalisation is becoming more and more widespread? How can we do something about the findings? (I'm actually asking, not trying to argue for legalisation one way or the other.)