What is the biggest single source of carbon monoxide emissions in North America?
A) Industry emissions.
B) Gasoline and diesel engines.
C) Off highway light cuty diesel engines.
D) Heavy duty diesel engines.

Question

Quizplus · Accepted Answer

Gasoline and diesel engines are the biggest single source of carbon monoxide emissions in North America. This includes vehicles, as well as other equipment and machinery that use gasoline or diesel engines.

What Is the Biggest Single Source of Carbon Monoxide Emissions