Introduction Once considered a glamorous and sophisticated habit, smoking is now viewed with increasing disapproval. The recognition of the health risks of smoking is a primary cause of this change in public opinion, and it has led to significant changes in the behavior of many Americans. Over the past four decades, the proportion of cigarette smoking among adults in the United States has dropped 30%. Private businesses and all levels of government have jumped on the nonsmoking bandwagon. Almost every state now restricts smoking bands for indoor workplaces. The U.S. Surgeon General has proposed that America become a completely smoke-free society. Despite suc