Can't help you out on the medical side, with the lungs.

If you want to lower your tolerance, apart from stopping smoking it, I know it comes out threw sweat. So you if you work out, alot, then it will lower your tolerance some.
WeedyBoyWonder Reviewed by WeedyBoyWonder on . weed just as bad on the lungs as cigarettes? Hello Board, I have never really been a smoker but recenty I have fallen more and more in love with marijuana. It just seems to take care of all my anxiety problems and just helps me get through the dull parts of the day and it also takes all the good parts of the day and makes them 5 times better. But I have been smoking alot and building up this annoying tolerance. I used to get blown out of my mind off of a few hits of a joint filled with schwagy stuff, but now I have to smoke so much Rating: 5