Ok, this calls for us to think about it logically.

Cannabis has no direct link whatsoever with any form of cancerous tissue, although, i hate to say it, any smoke will be bad for your lungs, altohugh maybe cannabis really isnt. What i do know is, no one has ever died from cannabis, no one will ever die from cannabis, which makes me think, maybe it actually doesnt cause cancer, and maybe it does prevent it. I dont know, but im gunner carry on smoking it, and if i get cancer, i'll let you know.