The most common source of carbon monoxide pollution is vehicle exhaust.

The Carbon monoxide (CO) is a colorless, odorless, tasteless, and toxic air pollutant. It is produced in the incomplete combustion of carbon-containing fuels, such as gasoline, natural gas, oil, coal, and wood. The largest anthropogenic source of CO in the United States is vehicle emissions. When we breathe high concentrations of CO leads to reduced oxygen (O2) transport by hemoglobin and with are able to get health effects

Acourse of medicine