Health effects of hookah pipe/water pipe smoking by the World Health Organization (WHO)CLEARNET LINK WARNING:http://www.who.int/tobacco/global_interaction/tobreg/Waterpipe%20recommendation_Final.pdfwikipedia hookah pipe: http://en.wikipedia.org/wiki/HookahInteresting reading. Water pipes are NOT a healthy choice. They don't anything in fact. No filtration at all, its just for show. It could add some humidity to the smoke, making is seem like its smoother or filtered in some way, but its not. It was originally used to make harsh stale tobacco smokable again.... it was never intended to be assumed that it filters anything out. . . .Some people absolutely swear that the government is hiding the facts about water pipes and carcinegens are removed , yadda , yadda. .but the truth is out there. . it does squat!  We would all like to romantically think that pot isn't harmful, but just look at the inside of any clogged up pipe to see the truth of what it does to your lungs.. . .. that can be mitigated a bit by using a vaporizor to some degree. . or eating the stuff.. . but hey. Try not to look at things you love with only rose-colored glasses on. I love pot more than anyone, but I also know what I scrape out of my pipes and that creosote and tar buildup is damn cancer-causing for sure. . . Taste that shit sometime. yuuuuk! You could waterproof the bottom of a ship with that stuff