There are two evils that humankind cannot get rid of. They are alcohol and tobacco. People get addicted to them very quickly. Smoking has no advantages. Consuming alcohol in low or moderate amounts can be beneficial. A glass of red wine reduces risk of heart diseases. If alcohol is consumed too often, it causes stroke and sudden death. To find out what role alcohol plays, in 2007 scientists carried out research and concluded that excessive alcohol use is the main cause of colon, liver, mouth, breast, esophagus and mouth cancer.