Marijuana does not cause mental illness

Dutch scientists have stepped up to the plate to counter the new conservative government's contention that marijuana causes schizophrenia, an argument the Dutch prohibitionists are using to attempt to shut down the cannabis coffeeshop industry. The authors of this study contend there is absolutely no scientific proof to back up these allegations.

I've said this before, but it's worth repeating. Marijuana does not cause anything. Excess consumption can be a symptom of an underlying condition but it does not create the condition. If anything it more likely alleviates the symptoms of those who would use it to self-medicate.