The tobacco smoke a smoker inhales is different from the smoke inhaled by those nearby. The major source of passive smoke is from the burning of the cigarette rather than what is exhaled by smokers. Both types of smoke contain thousands of chemicals. The chemicals present in both these types of smoke are similar, but the concentrations of the chemicals are different. Many of the toxic chemicals in tobacco smoke are found in higher concentrations in the tobacco smoke as it leaves the cigarette compared to inhaled smoke; in some cases, the concentrations are far higher. This smoke is largely produced from the lower temperature burning of.
