For hundreds of years tobacco has been a major commodity throughout the world. The tobacco industry today is more massive than ever, and is the basis of a substantial part of the world economy. It is the major employer, providing the livelihoods of millions of families. Hundreds of millions of people smoke and considerable number use tobacco in other forms. The Indians of tropical America first cultivated tobacco. When Columbus landed in the island of …showed first 75 words of 680 total…

…showed last 75 words of 680 total…wrinkled skin. It results in cancer in 3 percent to 5 percent of all cases. Other Cancers, All forms of smokeless tobacco contain high concentrations of cancer-causing agents. These substances subject users to increased cancer risk not only of the oral cavity, but also of; the pharynx, larynx and esophagus. Danger Signs, If you use smokeless tobacco, or have in the past, you should be on the lookout for some of these early signs of oral cancer.