The results of a new Otago University study comparing the harm caused by different drugs have been released. Here's the breakdown by drug:
This is the original paper in the Journal of Psychopharmacology: The New Zealand drug harms ranking study: A multi-criteria decision analysis
Other coverage:
I was wondering why cannabis was so high but this makes sense, it's not the ill effects the plant has (which should put it down with nitrous and hallucinogens) but what the state will do to you for possessing the plant that causes the most harm, which is a pretty clear statement that our policy settings are way off.