CAUSES OF CANCER – EFFECTS OF THE ENVIRONMENT
Many cancers are thought to arise because of the effects of the environment on the body.
This environmental effect is more than just the effects of industrial pollutants. It involves a lot of other factors such as physical causes, dietary, behavioral and cultural influences.
The first cancer group contains those cancers believed to be caused by well defined external factors. These are mainly tumors of adults and involve the skin, the respiratory tract, the upper digestive tract, the liver, pancreas and bladder. It also includes cancers of the womb and the blood-forming organs.
Personal habits are believed to be the major cause. These include cigarette smoking, alcohol use and sunbathing.
These factors cause 25 to 50 per cent of cancers in men in different populations.
All studies show the great effect of cigarette smoking not only in itself causing cancer but also of combining with other things such as alcohol and asbestos in increasing the risk.
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Tags: General health