That study is a good bit of info to have when you get into a discussion with someone who still believes that one joint is as harmfull as a whole pack of cigs. I smoke kind bud and not much of it. It only takes like one tiny pinner to get me stoned. Though that's not to say I would be against a nice hookah party now and then. I figure I smoke about 1\30 mabey 1\50 of what a normal cigarrette smoker inakes on a daily basis.