Technician A says one of the six principal air pollutants regulated by the EPA is nitrogen. Technician B says carbon dioxide contributes to global warming. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B

Question

Quizplus · Accepted Answer

Technician B is correct because carbon dioxide is a greenhouse gas that contributes to global warming. Technician A is incorrect because nitrogen itself is not one of the six principal air pollutants regulated by the EPA; nitrogen oxides (NOx) are.

Technician a Says One of the Six Principal Air Pollutants