CO (carbon monoxide)

CO (carbon monoxide) is said to be the most harmful substance among the components contained in exhaust gas, and it is often generated when fuels (hydrocarbons) are incompletely combusted in states of oxygen deficiency.
It is said that about 90% of CO emissions are from automobiles, and this was the first exhaust gas to be subject to regulation.
CO can also cause symptoms of poisoning.
However, diesel engines are said to generate very little CO compared to gasoline engines because they provide sufficient air for combustion.

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