there was a political party who ran in the last election in NZ called Legalize Cannabis..  Haha.  But on the point, my uncle has had lung cancer 3 times, and has 1/4 of one lung left, but he's been having some problems lately so he went to his friend in Cali who grows it for the pharms or whatever.. but smoking pot on 1/4 of a lung isn't exactly a good idea he said.. he almost died haha