Answer:
The largest anthropogenic source of CO in the United States is vehicle emissions.
Explanation:
The greatest sources of CO to outdoor air are cars, trucks and other vehicles or machinery that burn fossil fuels.
Carbon monoxide (CO) is a deadly, colourless, odourless, poisonous gas.
CO pollution occurs primarily from emissions produced by fossil fuel-powered engines, including motor vehicles and non-road engines and vehicles (such as construction equipment and boats).
Learn more about the carbon monoxide here:
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