Originally Posted by Village Genius Research has shown that marijuana’s adverse impact on learning and memory can last for days or weeks after the acute effects of the drug wear off.

Actually, recent research may actually show that cannabis helps prevent the memory loss experienced by people suffering from Alzheimer's. And no, I'm not saying you are incorrect. But the same goes for alcohol.

And alcohol - should alcohol be banned too in your eyes? And I would seriously recommend you take a second look at the affects on the human body caused by alcohol intake.