I am a student. I very stressed in exam. What I can't. Oh man. What is the causes of cancer.
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Cancer is a complex group of diseases with many possible causes. In this section you can learn more about the known causes of cancer, including genetic factors; lifestyle factors such as tobacco use, diet, and physical activity; certain types of infections; and environmental exposures to different types of chemicals and radiation. Some types of cancer run in certain families, but most cancers are not clearly linked to the genes we inherit from our parents. In this section you can learn more about the complex links between genes and cancer, as well as genetic testing and how it is used. In this section you can get information on cigarette, cigar, and smokeless tobacco use, and learn how it affects different groups of people. Get the facts on how diet, physical activity, excess body weight, and alcohol use may affect your risk of cancer. In this section you can learn more about the link between too much sun exposure and cancer. Learn about the different types of radiation exposure and how it might affect cancer risk. Learn about some of the environmental causes of cancer that may lurk in our homes, at work, in pollution, and even in some medical tests and treatments. You can also learn how some types of infections are linked to cancer.
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