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He observes that work expands so as to fill the time available for its completion.
knowing the causes of cancer will always provide a basis for understanding the potential prevention for cancer. in case a cause is known then it can be easy to prevent cancer. the following are some of the elements that are possible causative agents that could increase a persons risk of cancer:
1. tobacco smoking
studies shows that tobacco smoking is the largest single contributor to cancer mortality.
2. some infection
some types of cancer causing infections include hepatitis B virus, hepatitis B virus, human papilloma virus and Helicobacter pylori virus.
3. Diet, overweight and obesity, and physical inactivity
4. Alcohol consumption
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