i have done a fair amount of research on the subject. one joint does have many more carcinegons than one cigarette. i dont know about thirty though, and really it is a moot comparison to make. yes, cannabis has far more carcinegons, but the thing is it has never ever once in thousands of years caused cancer. when i was researching it, it said a similar study(one dealing with what chemicals are in something and which ones are carcinegons) for coffee. it has over 800 chemicals, and of only 21 tested, 17 were found to cause cancer in mice, yet coffee isnt a cancer causer. i mention that because another thing a lot of people try to say is well there are this many chemicals in weed smoke and bla bla bla carcinegons. so even if what he says is true, and from the research ive done it seems a little exaggerated, it is totally misleading.
but to all you people who think otherwise, cannabis does have more carcinegons than tobacco, so you arent going to come up with contrary proof, so id say maybe take alittle of your own advice and look it up. has a lot of carcinegons, but doesnt cause cancer, that is the fact not spun to support one side or the other, just the simple truth