Question: Some of the new cars being made can run on a renewable fuel that is made mostly from corn. Scientists are developing even more renewable fuels to replace gasoline. Why are renewable fuels most likely becoming more important?
Options:
Renewable fuels release less energy.
Car fuel tanks are being made smaller.
The demand for gasoline is decreasing.
Nonrenewable fuel supplies are limited.
Answer: Nonrenewable fuel supplies are limited.