Tobacco smoke
Tobacco smoke
Tobacco smoke (/təˈbækoʊ smoʊk/) is the smoke generated by burning tobacco products, such as cigarettes, cigars, and pipe tobacco. It is a complex mixture of over 7,000 chemicals, many of which are harmful to human health.
Etymology
The term "tobacco smoke" originates from the plant genus Nicotiana, named after the French ambassador to Portugal, Jean Nicot, who introduced tobacco to France in 1559, and the English word "smoke", derived from the Old English smoca.
Composition
Tobacco smoke is composed of two phases: a particulate phase and a gaseous phase. The particulate phase includes nicotine, tar, and carbon monoxide, while the gaseous phase includes ammonia, hydrogen cyanide, and benzene.
Health effects
Exposure to tobacco smoke can lead to numerous health problems, including lung cancer, heart disease, and chronic obstructive pulmonary disease (COPD). It is also a risk factor for many other types of cancer, as well as stroke and emphysema.
Secondhand smoke
Secondhand smoke, also known as environmental tobacco smoke (ETS), is a mixture of the smoke given off by the burning end of a cigarette, pipe, or cigar, and the smoke exhaled by smokers. It is a major source of indoor air pollution and poses significant health risks to non-smokers.
Legislation and control
Many countries have implemented smoking bans in public places and restrictions on tobacco advertising to reduce exposure to tobacco smoke and discourage smoking.
External links
- Medical encyclopedia article on Tobacco smoke
- Wikipedia's article - Tobacco smoke
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