I notice bias can go both ways. the title of this thread says "no cancer from marijuana" while the posted article says "less likely to cause cancer". just saying this whole debate over weed is due to both sides obscuring the facts.

that, and I can't believe it doens't cause lung cancer at all, unless there's enough THC to block every single carcinogen contacting every single cell in the lungs. one way or another, smoking causes constant cellular irritation.