Why is using tobacco in any form injurious to health? Explain.

Explanation

The burning tobacco and the paper produce more than 1,000 chemicals in the form of gases, vapours and particulates. The substances include: nicotine, carbon monoxide, hydrogen cyanide, benzopyrene etc. Many of these are irritants and have toxic effects on the body. Tobacco is used for smoking and chewing. Its main stimulating component is nicotine, which causes addiction. Harmful effects of tobacco include lung cancer, oral cancer, emphysema, blood pressure variation, heart diseases, peptic ulcer etc.