Does Marijuana Cause Cancer?

jammin screw said:

Maybe there's some kinda activity in that area... I wold think they'd be somewhere elsethen that... Ur over in that area for awhile breathing eatin n shit, "hey try one of our cancernillA shakes" for real....

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LOL cancer burgers.I've always wondered why.And its always been a fast food restaurant for the 21 years I've lived here.But that sing has been up for like 6 years which makes me think somebody got cancer or a birth defect from it that's why they had to post a sing.