Which of the following are an advantage and disadvantage of hydrogen energy use?

Advantage: Hydrogen is easy to store.
Disadvantage: Hydrogen is scarce.

Advantage: Hydrogen allows for zero emissions.
Disadvantage: Hydrogen is difficult to store.

Advantage: Hydrogen is an efficient form of energy.
Disadvantage: Hydrogen allows for pollution to be emitted.

Advantage: Hydrogen fuel has established infrastructure.
Disadvantage: Hydrogen is scarce.