I used to smoke pot, but I've never touched tobacco of any kind. That **** will kill you.
Just so we are clear here, smoking pot is still bad for your lungs. However, it does not contain nicotine which is a well known carcinogen. So in that respect it is "better" for you than regular smoking... it is still not really "healthier." That being said I still smoke cigarettes... trying to quit though... and as far as pot goes... well, I'll just let you all guess whether or not I smoke that.