It is a renewable fossil fuel. It is a nonrenewable fossil fuel. It is a renewable biomass fuel. It is a nonrenewable biomass fuel.
I gave my students this multiple choice question: Suppose a new fuel for cars is derived from coal. Cars can go twice as far on a tankful of the new fuel as they can on the same amount of gasoline. How would you categorize the new fuel?

Only one answer is correct among these 4 choices:
- It is a renewable fossil fuel.
- It is a nonrenewable fossil fuel.
- It is a renewable biomass fuel.
- It is a nonrenewable biomass fuel.

Could you tell me which one is correct?

It is a nonrenewable fossil fuel.