Why smoking is harmful to our life?

1) Cancers
Smoking increase risk of many kind of cancers, especially lung cancer. Most of patients with lung cancer are smoker. Other cancers eg cancer of colon, stomach, esophagus, nasopharynx, oral, tongue, breast, ovary, uterus (too many) are associated with smoking
2)respiratory disease
-more than 90% of patients with chronic obstructive airway disease(COAD). Patient with severe COAD are very disabiling, can be breathless even at rest, and may need long term oxygen. Patient with COAD may eventually die from a COAD exacerbation or chest infection.
-It can trigger asthma, and make asthma difficult to control
-chronic cough
3)cardiovascular disease
-smoking can cause atherosclerosis (hardening and narrowing of blood vessels) so increase risk of stroke, coronary heart disease and peripheral vascular disease. So patient may loss his life or loss his limb.
-smoking increase of venous thrombosis. Deep vein thrombosis can casue pulmonary embolism, and this condition can kill in short time.
4)social impact
-financial: need money to buy cigerette. also need money to pay for smoking related illness. A substantial amount of money is used to treat smoking related illness by our government.
-poor smell, yellowish teeth, poor personal image that can hinder your soical relationship with others
-smoking can affect sexual ability of male, can reduce sperm count/activity and cause subfertility.
-smoking not only harm yourself, but also harm other people. 2nd hand smoking can lead to all the physical illnesses listed above.
-smoking harm our environment, causing air pollution
-many fire accidents are caused by smoking.

so STOP SMOKING, is the best and wise decision for every smokers.