This category of air pollutants is emitted directly from identifiable sources and pollutes the air immediately upon being emitted.
A) tertiary pollutants
B) quaternary pollutants
C) secondary pollutants
D) primary pollutants

Question

Quizplus · Accepted Answer

Primary pollutants are emitted directly from identifiable sources such as factories, vehicles, and power plants, and immediately pollute the air. Examples of primary pollutants include carbon monoxide, sulfur dioxide, and nitrogen oxides.

This Category of Air Pollutants Is Emitted Directly from Identifiable