Question

if energy cannot be destroyed, why do some people worry about the energy supply? multiple choice moving water is a renewable energy source the concern is with usable sources of energy. it cannot be destroyed, but it cannot be created either. most of our chemical supply is chemical, which is burned.

Explanation:

The law of conservation of energy states energy can't be created or destroyed, but the worry is about having accessible and usable forms of energy like fossil - fuels which are finite. Usable energy sources matter for human activities.

Answer:

The concern is with usable sources of energy.