What are the main automobile emission pollutants?

The following is the introduction of automotive emissions pollutants: 1, carbon monoxide: carbon monoxide is a hydrocarbon fuel combustion intermediate product of carbon monoxide in the exhaust is due to the incomplete combustion of hydrocarbons caused by the CO is a colorless and non-irritating gas. Automobile and internal combustion engine exhaust in the harmful concentration of the largest components of carbon monoxide and human blood erythrocyte affinity is very strong people in the inhalation of carbon monoxide blood will lose the ability to transport oxygen will prevent the body's metabolism resulting in a lack of oxygen in the body and cause asphyxiation. 2, hydrocarbons: HC in the exhaust is composed of uncombusted fuel hydrocarbon incomplete oxidation products as well as some of the products of the combustion process is decomposed.