All smokers are aware of the effect of smoking on the human body, but, nevertheless, they continue to smoke, motivating it by the fact that this is their life and they have the right to dispose of it as they want. Most of them know that smoking will take away 10-15 years of their life, and the last years of their life can be painful due to problems, but, after all, it will not be soon, but now they are still full of strength and hope that it is not theirs. will affect. Tobacco smoke contains more than 4,000 chemical compounds, of which more than 40 are especially dangerous, as they cause cancer.