Cancer is Complex biological process, and there is no single factor responsible for the disease, but several A combination of factors, may be hormones or the body's immune weakness, genetics and gene Task.
The main reasons are environmental factors They include:
- Toxic substances such as tobacco, alcohol.
- Some of the foods that we eat such foods Saved and chimney and high-fat foods.
- Some types of bacteria and viruses.
- Some chemicals, such as asbestos And gasoline.
- Such as sun rays, radioactive materials.
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cancer prevention