Answer:
Although nicotine is a very addictive substance it's relatively harmless. It's the carbon monoxide, tar and other toxic chemicals in tobacco smoke that will cause serious damage to your health. Clean forms of nicotine are licensed to help smokers quit.
Smoking causes cancer, heart disease, stroke, lung diseases, diabetes, and chronic obstructive pulmonary disease (COPD), which includes emphysema and chronic bronchitis. Smoking also increases risk for tuberculosis, certain eye diseases, and problems of the immune system, including rheumatoid arthritis.
