It is present in indoor and outdoor air in varying. It has been well established that there is a dose-dependent increase in carboxyhemoglobin COHb concentration with tobacco use.
Carbon monoxide CO is a poisonous colorless and odorless gas that is produced when carbon-containing fuels burn incompletely.

Why is carbon monoxide in cigarettes. Sources of carbon monoxide most often include car exhaust malfunctioning heating systems and inhaled smoke.








