Automobiles and trucks are NOT an important source of which of the following air pollutants?

Question

Quizplus · Accepted Answer

Automobiles and trucks primarily emit carbon dioxide, hydrocarbons, and nitrogen oxides as a result of fuel combustion. Sulfur oxides, however, are more commonly associated with industrial processes and the burning of coal or oil that contains sulfur, making them less directly related to emissions from automobiles and trucks.

Automobiles and Trucks Are NOT an Important Source of Which