Apparently, most of a cigarette smolders away without the smoker actually puffing on it. The lower temperature of combustion when a cigarette is smolder results in higher amounts of incomplete combustion products, such as CO, and large organic compounds. Ultimately, the sidestream smoke, as it leaves the tip of the smoldering cigarette, contains higher quantities of the hazardous gases and particles than the stuff the smoker inhales. Fortunately, sidestream smoke gets diluted considerably as one's distance from the cigarette increases.