Better Know What You Smoke
According to scientists it's not so much tobacco which causes harm to human health, as synthetic substances containing in cigarettes. That's why it's very important to be scrupulous about choosing tobacco producer and find out what cigarettes consist of.
The amount of tobacco in some brands of cigarettes is less than 10%. Everything else is synthetic. Unfair manufacturers sometimes add wastes of production: dust, chemicalized paper, preserving agents etc. Companies "forget" to mention such components on the package.
Here are most dangerous from them: benzene, which is a natural constituent of crude oil, phosgene and benzopyrene. These substances are the most powerful chemical mutagens and carcinogens.
The smoke inhaled contains 1 to 3 milligrams of nicotine and 12 milligrams of tars in one cigarette.