(i) Cigarette smoking contains 56 harmful chemicals including nicotine. During smoking, the smoke enters the body of the non-smoker through inhalation. This is called second hand smoking. Non-smokers suffer greatly due to second hand smoking.
(ii) The lung and alveolar walls of the smoker become thin, weak and destroyed.
(iii) Cigarette smoke destroys the alveoli of the smoker’s lungs and creates spaces inside. This is called emphysema. In this disease, the respiratory area of the lungs decreases and the elasticity decreases.
(iv) Cancer-causing cells and tumor-like growths may develop in lungs of non-smokers. Toxic nicotine and tar cause lung cancer.
(v) The cilia of the walls of the alveoli of the lungs of non-smokers may be destroyed. It can cause bronchitis.
(vi) Women who smoke are more likely to be infertile and have malformed children.
(vii) Secondhand smoke can cause pneumonia and asthma in children.