(a) Regular and heavy smoking increases the heart rate which leads to the palpitation of heart.
(b) Heavy smoking is the major factor causing lung cancer, cancer of the mouth and tongue.
(c) Smoking habit leads to chronic bronchitis.
(d) Cigarette smoking is a leading risk factor for the cancer of oesophagus, stomach, pancreas and the cervix.
(e) Cigarette smoking by pregnant women has a harmful effect on the foetus in the womb.
(f) Smoking may also cause coronary artery disease.