Weird how smoking pot is viewed as perfectly ok and smoking cigs is tantamount to murder.
That's not exactly true. The health risks of smoking MJ are not fully assessed because it is illegal. A single joint has about as much crud in it as ten cigarettes (I know most people don't smoke a whole joint). The bottom line is inhaling noxious carcinogens into your lungs is bad for you whether it's tobacco, Marijuana, asbestos, or silicon.
I saw a patient in our out patient clinic the other day who was starting to look, clinically, like she was developing chronic bronchitis (and on her way to COPD). She also smoked a PPD but had cut down to 1/2 a pack. She was perfectly honest about smoking MJ, and frankly I don't really care about that, other than to point out that she was smoking a joint a day, so she was still basically smoking a pack per day and her lungs weren't going to get any less wheezy while she was doing that.
Before anyone jumps my case, I think MJ should be legal for recreational use. However, I don't buy into this bullshit about MJ being some magical plant that cures all disease and doesn't harm the lungs when smoked. Because I know it's bullshit.