Biodiesel and Ethanol Are Liquid Fuels Derived from Plants

Multiple Choice

Biodiesel and ethanol are liquid fuels derived from plants. Producing ethanol and biodiesel requires energy inputs that make them less efficient sources of energy. Why are they considered attractive, alternative sources of energy?

A) Liquid fuels can be burned in cars and trucks.
B) Biofuels are carbon neutral.
C) Biofuels are renewable sources of energy.
D) These fuels can be processed using an existing energy infrastructure.
E) All of the above