That's a great argument for cannabis over tobacco, but it avoids the question that was initially asked.

Look over in the lounge for a more balanced pro-cannabis post from beachguyinthongs. He quotes more complete findings.

I have to say that anyone who has to be convinced that inhaling smoke is more stressful on the lungs than not inhaling smoke either has never smoked anything themselves, or... Be well. Go forth and spread ignorance veiled as propaganda veiled as insight.

...and my lungs are just fine thank you. I vaporize.