In an average one-hour hookah session, you inhale 100 to 200 times as much smoke as from a single cigarette.
"Waterpipe Tobacco Smoking: Health Effects, Research Needs and Recommended Actions by Regulators. WHO Study Group on Tobacco Product Regulation (TobReg)." World Health Organization. Geneva, Switzerland. 16 Sept. 2005.http://www.who.int/tobacco/global_interaction/tobreg/Waterpipe%20recommendation_Final.pdf