If those scientists need a human to feed that stuff to, I'll take one for the team. LOL.
I smoked it daily when I was younger through highschool and beyond a few years but quit a couple years ago and I didn't notice any of those side effects. I call BS that just because rats were effected in 20 days doesn't mean humans are the same. Our great gov't probably even paid a grant for that stupid study. You know the difference between a drunk and a smoker? The drunk blows the red light, the smoker stops at the green. Tell me which one is worse. I think daily alcahol use is physically worse for you too. Might as well sell it at gas stations, tax the crap out of it and get the U.S out of debt.