Tobacco.

Approximately one half of the world population uses tobacco. Smoking cigarettes is a common social habit. Most people smoke in the US. It is known that tobacco is dangerous to our health and is the main cause for cancer. Many people ignore this fact for the joy of smoking. What are the pro and contra reasons for smoking, how did it actually got it's way to our society. The origin of tobacco was found in …

…to that of a nonsmoker precancerous cells are replaced with normal cell growth risk or stroke is typically lowered, possibly to that of an nonsmoker risk of cancer of the mouth throat esophagus bladder kidney and pancreas decreases - 15 years risk of coronary heart disease is that of a nonsmoker There are too many opposing reasons for smoking. People who have been cigarette addicts and have stopped smoking acknowledge the positive aspects of not smoking.