Visit a local doctor. Learn about the harmful effects of smoking. You can also collect material on this topic from other sources. You can seek the help of your teacher or parents. Find out the percentage of people in your area who smoke. If you have a smoker in your family, confront him with the material that you have collected.

In my area, around 10% of the total population smokes. It affects the remaining population in a direct or indirect way. Tobacco contains harmful chemical substances such as nicotine, which are responsible for increasing blood pressure and heart rate.

Smoking is injurious to health as it leads to increased incidents of lung cancer, cancer of the urinary bladder and throat, gastric ulcers, cancer of bronchitis, and diseases such as emphysema, coronary heart disease, etc.

• Cigarette smoking affects nearly every organ, causes many diseases, and lowers smokers' health. 
• Heart disease, stroke, and lung cancer are more common in smokers.
• Smoking causes poor health, increased absenteeism, and higher health care costs.
• Smokers risk heart and blood vessel disorders (cardiovascular disease).
• Smoking thickens and narrows blood arteries. This raises blood pressure and heart rate. Clots form. A stroke happens when a clot stops blood flow to part of the brain or a blood vessel bursts. Smoking inhibits blood flow to your legs and skin.
• Smoking damages lung airways and air sacs (alveoli).
• Smokers have a higher risk of dying from COPD. COPD causes emphysema and chronic bronchitis. Smoking causes most lung cancers. Smoking might induce or worsen asthma attacks. 
• Smoking can cause cancer in the bladder, blood (acute myeloid leukaemia), cervix, colon, rectum, esophagus, kidney, ureter, larynx, liver, oropharynx (throat, tongue, soft palate, tonsils), pancreas, stomach, trachea, bronchus, and lungs.
• Smoking raises cancer patients' and survivors' risk of dying from other diseases.
• Smoking can hinder pregnancy. It can impair her baby's prenatal and postnatal health. Smoking increases the risk of preterm delivery, stillbirth, low birth weight, SIDS, ectopic pregnancy, and orofacial clefts in newborns.
• Smoking can lower men's fertility and raise miscarriage and birth defect risks.
• Smoking can harm bones.
• Women who smoked after motherhood had weaker bones.
• Smoking impacts teeth, gums, and tooth loss.
• Smoking can cause cataracts, which cloud the eye's lens and impair vision. It can cause age-related macular degeneration (AMD). AMD damages a small region near the retina, the eye's central visual organ.
• Smoking causes and worsens type 2 diabetes.
• Smoking increases inflammation and lowers immune function.
• Rheumatoid arthritis is caused by smoking.
• Quitting smoking can add years to your life by reducing your risk of smoking-related diseases.