Increases the risk of stomach cancer, blood cancer and lymph cancer, because it contains levels of 1.3-Butadine, which is a chemical used to produce rubber.
Inhibits DNA repair and can damage the lining of the lungs, as it contains Akrolein, Formaldehyde and Chromium VI (used to make alloys, paints and dyes) that can eventually lead to lung cancer.
Causes various types of cancer, because cigarettes contain Arsenic substances that are used to preserve wood.
Causes leukemia due to cigarettes contain Benzene substances that are actually used to produce other chemicals.
Disrupt DNA repair and cause kidney damage as well as arterial blood vessels, due to the content of Cadmium substances ie metals used to make batteries.
The content of tar on cigarettes will be attached to the lungs, and cause a brown color on the teeth and nails.
The danger of smoking for future health is that it can cause heart disease and heart attacks. Because the carbon monoxide content in cigarette smoke is inhaled into the bloodstream. Carbon monoxide reduces the amount of oxygen carried in red blood cells and increases the amount of cholesterol absorbed into the inner lining of the arteries, resulting in hardening of the arteries or atherosclerosis.
Nicotine in cigarettes is a dangerous and highly addictive chemical that can cause increased blood pressure, heart rate, blood flow to the heart and constriction of blood vessels. Nicotine also contributes to the hardening of artery walls, which, in turn, also causes heart attacks. These chemicals can stay in your body for six to eight hours depending on how often you smoke.
Women who smoke or who do not smoke but often exposed to tobacco smoke tend to give birth to low-weight babies and there is an increased risk of premature birth.
The next danger of smoking is that it can lead to a very deadly stroke.
Smoking can increase the risk of cataracts (opacification of the lens of the eye that makes you hard to see) as well as related to damage to the retina of the eye.
It causes type 2 diabetes mellitus and can make it more difficult to control blood sugar levels. The risk of diabetes is 30-40% higher in active smokers than non-smokers.
Millions of people in the world manage to quit smoking, and with a strong desire, confidence and motivation you can also be free from tobacco addiction. Imagine how happy your life and your family for being free from the dangers of smoking harm to your health.
Reference:
www.heart.org
www.cdc.gov 
