didn't read the entire thread but what a crock of shit! in some cases just breathing "causes" cancer. people who don't smoke anything, ever, still get it. we are ALL susceptible to developing cancer based on environmental stresses and genetics. man causes more cancer than any plant ever could.
To a degree we are all preaching to the choir, but when one side presents in a professional manner and the other shouts about it being shite then even when it is only those who support the shite argument reading IMHO it loses some of its focus.
Anyway the point I would make to all this its shite argument is I'll stick a hundred down on the fact in this litigation loving society where medical weed is available and a patient is advised to use MMJ, has never smoked anything in their life before and contracts cancer subsequently they would happily use this study to support their own civil suit for damages after being directed to use a medicine that 'may' have cause the cancer as possibly indicated in an official medical sientific paper.