What tailpipe emission can only be reduced by increasing fuel efficiency?
A) Carbon dioxide.
B) Particulate matter (PM).
C) Ozone.
D) Nitrogen dioxide.

Question

Quizplus · Accepted Answer

Carbon dioxide emissions are directly related to fuel consumption, so increasing fuel efficiency is the only way to reduce these emissions. Particulate matter, ozone, and nitrogen dioxide can also be reduced through the use of emission control technologies, such as particulate filters and catalytic converters.

What Tailpipe Emission Can Only Be Reduced by Increasing Fuel