"The research about finding more tar is completely useless. Herb that is dried and cured well produces FAR less tar than weed that is hastily dried and not cured. This is the type of study that can be manipulated the same sort of way some guy put a gas mask on monkeys and suffocated them to show that cannabis kills brain cells. Benzopyrene is a carcinogen that is created when lipids combust. Since all cannabinoids are lipids, cannabis will produce more benzopyrene the better it is. Those same cannabinoids have been found to have a range of anticancer effects. The link between cancer and cannabis has been studied extensively, the studies have been controlled in ranging degrees of bias from torching shitty uncured weed to vaping dank. Cannabis has been conclusively proven not to cause, agitate, catalyze, potentiate, complicate or even to have a synergistic negativity with cancer, but in every case, there is some indication of treatment. I have seen all the studies. I'm also going to be an oncologist when I grow up."