That's what I'm worried about, emphysema because I smoke like a mad man. I always complain of not getting high so I smoke as much as my lungs can possibly take. I usually smoke through a pipe or a bong (which I will use to completely fill my lungs for each hoot).
Often I find that I burn the back of my throat (immense coughing that leads to more problems. I once stressed my back muscles from coughing so much!), tightness in my lungs, weezing--a crackling like sound, streaks of black/grayish crap mixed in my phlem--phlem is clear.

I have been smoking for 13 years now. It is extremely hard to lay off for even a few days. Is a vaporizer really worth the money? How about the other psycoactive components from weed? I heard that the vaporizer is set to vaporize THC only.