Smoking tobacco causes cancer. Several published studies have shown that smoking can cause cancer in the lungs, mouth, throat, larynx, oesophagus, bladder, bowel, cervix, kidney, liver, stomach and pancreas.
Besides this, some studies have also shown that smoking can damage arteries through different mechanisms and affect the normal functioning of the heart to cause coronary heart disease, heart attack, stroke and peripheral vascular disease.
Smoking is also known to cause chronic obstructive pulmonary disease (COPD) and increase the risk of contracting pneumonia. Smoking is not good for the respiratory tract as it can exacerbate asthma. Another study has shown that smoking can reduce fertility in men and women. Excessive smoking may cause impotence in men, and increases the risk of miscarriage, premature or stillbirth among women.
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