From the preface: "The examination of the scientific literature on low-tar and low-nicotine cigarettes is not unique to this monograph. Several of the earlier volumes devoted one or more chapters to discussions of the various health aspects of tar and nicotine levels. However, this monograph includes more than just the study of amounts of tar and nicotine. Chapter 5 includes a discussion on the continued health risks to smokers, even those who smoke a low-tar/ low- nicotine cigarette, while Chapter 2 describes how changes in the cigarette design affect an individual's smoking habit. Chapter 7 points out how the tobacco companies' advertisements have changed to match the emerging public preference for low-tar/low-nicotine cigarettes."