Question

by 2009, american car manufacturers were required to meet minimum fuel - efficiency standards that increased the average miles per gallon to 27.5. by 2016, that standard increased to 30 mpg. what effect did this have? a. increased air pollution b. decreased fuel efficiency c. increased water pollution d. decreased energy consumption please select the best answer from the choices provided

Explanation:

When car manufacturers meet higher fuel - efficiency standards (from 27.5 mpg to 30 mpg), cars use less fuel to travel the same distance. Less fuel consumption means decreased energy consumption. Higher fuel - efficiency generally leads to reduced air pollution, not increased, and has no direct relation to water pollution in this context. Also, the standards are about increasing fuel - efficiency, not decreasing it.

Answer:

D. decreased energy consumption