Smoking directly contributes to the cancer process in many ways.

1. Inhaled carbon monoxide inhibits the oxygen-carrying capacity of the red blood cells.
2. Stress is produced in the body.
3. The effect of 1 and 2 is to increase blood viscosity and reduce blood circulation.
4. Carcinogenic chemicals are introduced into the body.
5. Smoking destroys Vitamin C, essential to collagen integrity, oxygen metabolism, and body de-toxification.
6. Irritation in the respiratory tract is capable of triggering lung cancer.