smoking , drinking linked to throat , stomach cancer

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London--Drinking alcohol and smoking cigarettes appear to increase the risk of certain common throat and stomach cancers,Dutch research reported on Monday. The incidence of stomach cancer has fallen dramatically in the United States and western Europe over the past 60 years but the disease remains a serious problem in much of the rest of the world, where it is a leaking cause of cancer death, according to the Mayo Clinic. I wonder that all the people know exactly smoking will do great harm to their health, but they still keep on smoking , and never want to give it up . Why people consider smoking as the daily life one must concern.