Cigarette smoke is a very difficult pollutant to remove from the air. This is because there are TWO major components to the smoke. The first problem of cigarette smoke are the many toxic gasses produced by burning cigarette's. These gasses are in part produced because cigarette manufacturers dose the tobacco in many different chemicals in order to flavor the cigarette's and keep them burning. Ammonia gasses, Carbon Monoxide, and phenol are just a few of the dozens of toxic gasses produced when cigarette's are burned. Besides being highly toxic, these gasses also emit many foul odors. The second problematic component of cigarette smoke is the very high level of tar solids that are disseminated into the air when cigarette's are burned. This is the same petroleum based tar used to make asphalt roads. This petroleum based tar clouds the air and sticks to every surface of the room. Not only can you see this tar in the air you can also see and feel this yellow brownish sticky substance on surfaces such as walls and furniture. Cigarette smoke tar even seeps into your homes air vents, and appliances with vents such as TV's and stereos. This disgusting goop discolors paint and it also has a terrible, sickening odor.