From what, 10 to 30?
There are over 3000 (identified) chemicals in cigarette smoke, and the reason you get more tar (I'd love to hear someone try and explain what that word really means. Winner gets a prize!) with a doob is because it is compared to a FILTERED cigarette, which is the point of adding a filter in the first place. It's like saying that drinking unfiltered water exposed you to five times the chemicals as filtered water. No ****!