What is fuel scarcity and its alternatives?

its when it becomes hard to find, thus more expensive and scarce. As for alternatives its Hyrogen.

And that's it.

Forget about bio fuels as we (the people of the world) need the space, crops and resources ie water for ourselves.

No point of being able to drive to the shops when you are hungry if they have no food.
Unless you eat alge and plankton.

Bon Appetit.