The Partnership for a Drug-Free America hosts a web page on Tobacco, describing this chief cause of preventable death in the United States. The physiological "appeal" of nicotine is explained.

http://www.drugfreeamerica.org/tobacco.html

Secondhand Smoke - A Cloudy Debate by Mayo Clinic's Health Oasis discusses the severity of illness in children attributable to exposure to secondhand smoke. This article is an eye-opener for smokers.

http://www.mayohealth.org/mayo/9708/htm/2nd_hand.htm

Click on Sickle Cell/Thalassemia Information from this site of the Joint Center for Sickle Cell and Thalassemia Disorders that describes the effects these diseases have on the respiratory system.