Well a couple of weeks ago a teacher of mine was discussing marijuana with our class. One of the students asked if weed causes cancer. I said it didnt cause cancer. The teacher gives me this are you really that stupid look. She says in a know it all voice, "well I'm pretty sure anything you inhale into your lungs causes cancer". I told here that the THC actually stops the cancer. She said she's never heard of that and challenged me with proof. So, do you guys have some links to studies or the like that will prove to her that marijuana doesn't cause cancer.