2. Tobacco Smokeless tobacco use causes gum disease, oral cancer and increases the risk of cardiovascular disease.(govinfo.library.unt.edu) Cigarette smoke contains over 4,800 chemicals and 69 of which are know to cause cancer.(lung) About 8.6 million people in the U.S. have at least one serious illness caused by smoking.(lung) Smoking-related diseases claim an estimated 443,00 American lives every year. (lungusa.org)
3. Alcohol Alcohol is the most used drug today in the USA and it is the #1 drug problem of teenagers and children. 75% of all car and motorcycle accidental deaths are teens and young adults under the influence of alcohol. Alcohol not only harms the liver causing sclerosis of the liver, ulcers and cancer. (ezine)