According to the American Lung Association, there are an estimated 50 million people who smoke. For some reason people just do not fully understand the risks they take by smoking. Cigarette smoking is a frequent cause for many health problems with smokers. To begin with, there are many hazardous ingredients in cigarette tobacco. Some of the ingredients are poisonous or addictive. Cigarette smoke produces thousands of chemicals that are hazardous to a smoker’s health. There are over 4000 chemicals produced by a burning cigarette. At least 200 chemicals are known to be poisonous to a persons health. Though filters help block some of the chemicals, they will not stop them