They have proved it burns the hell out of your lungs worse than cloves cigs. There is study done by University in Amsterdam. They also stated that long term pot smokers damaged there lungs to a point that even when they stopped smoking there lung never healed. The have been working on this study for like 20 years now. There is also talks of banning it there.<quoted text>
There hasn't been a single study able to show that marijuana causes cancer, though they've tried really hard to construct one. If you can provide us with a link to one, please do.
I saw this study on pbs about two years ago and then logged into the database that all the Schools and Hospitals send there findings to for storage and found it. They studied a lot of people for many years. They are working on connecting it to cancer because there was a good percentage of users who did end up with lung cancer and they were not tobacco users.
But hell and smoke long term in your lungs can cause cancer. There is documented cases from people who never smoked but worked very odd jobs and got it. I remember one was a bbq pit man. He was around a wood fire all day for many years and he ended up with lung cancer.