sábado, 19 de mayo de 2012

The tobacco

     Tobacco is an agricultural product processed from the leaves of plants in the genus Nicotiana. It can be consumed, used as a pesticide and used in some medicines. It is most commonly used as a drug.In consumption, it most commonly appears in the forms of smokingchewingsnuffing, or dipping tobacco.

     Cigarette smoke contains over 4,000 chemicals, including 43 known cancer-causing (carcinogenic) compounds and 400 other toxins. These include nicotine, tar, and carbon monoxide, as well as formaldehyde, ammonia, hydrogen cyanide, arsenic, and DDT.

     Tobacco smoking is the practice where tobacco is burned and the resulting smoke  is inhaled. Tobacco is the most common smoked substance .Smoking is practiced by approximately 1.22 billion people. In most communities men are more likely to smoke than are women.

     The analyses made seem to controvert the old theory that the injurious effects of tobacco-smoking are due directly to the presence of nicotine in the smoke.  Tobacco diseases come in many forms, from lung cancer and oral cancer to gangrene. 

- And finally, I leave a video about the tobacco:

                                                    Realised by: Encarna Collados.

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