Question

alternative energies can be used without running out. what do we call this type of energy production?
sustainable
non - renewable

Explanation:

Sustainable energy production means using energy sources that can be replenished and won't run out. Non - renewable energy sources, on the other hand, are finite and will eventually be depleted. Since the question asks about energy that can be used without running out, the key concept is sustainability.

Answer:

Sustainable