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Smoking a bad habit because
- Smoking tobacco is the greatest risk factor for cancer mortality.
- Tobacco smoke has more than 7000 chemicals and at least 250 are known to be harmful and more than 50 of them are known to cause cancer.
- Tobacco smoking causes many types of cancers, including cancers of the lung, oesophagus, larynx (voice box), mouth, throat, kidney, bladder, pancreas, stomach, and cervix.
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