the reason you aren't worried about your future health is you are just 20 years old, most people that age aren't worried about life at 50 or later....hence all the tattoos you people get and later regret....

there is far more tar in marijuana than in dried tobacco, but probably less pollutants, since most pot is grown without as many harmful commercial style fertilizers...

the problem with smoke of any kind, is that it contains carbon monoxide, carbon monoxide binds to the hemoglobin in your blood, and thereby reduces the oxygen carrying c