So does the most respected opponent: http://www.counterpunch.org/gardner07022005.h...I'm neither an opponent or nor proponent of marijuana. I'd like to say of course marijuana smoke is carcinogenic. Any smoke fumes produced from burning which result in carbon IS by scientific fact, carcinogenic. So, basically the fumes produced from burning anything is carcinogenic. This is a basic fact. Yet, many marijuana proponents deny it.
The fact is marijuana has been shown to inhibit all kinds of cancer: http://www.alternet.org/story/9257/
Marijuana Cuts Lung Tumor Growth in Half, Study Shows: http://www.sciencedaily.com/releases/2007/04/...
Science Daily, 17 Apr 2007
And on and on and on.