smoking develops cancer, and there is more than 4000 toxic chemicals inside a cigarette. Also, the nicotine inside is very addictive. Second, smoking is also very harmful to other people. People around a smoker can also smoke by second hand smoking. What Is Secondhand Smoke?
When you breathe in smoke that comes from the end of a lit cigarette, cigar, or pipe (sidestream smoke) or that is exhaled by a smoker (mainstream smoke), you're inhaling almost the same amount of chemicals as the smoker breathes in. Tobacco smoke contains more than 4,000 different chemical compounds, more than 50 of which are known to cause cancer. These are just a few of the chemicals that float into your lungs when you are exposed to secondhand smoke: