We should use our energy resources efficiently.

Electromagnetic energy arises from the interaction of magnetic and electric fields.

Dark energy is associated with accelerating the expansion of the universe.

Nuclear energy can play an important role in meeting the energy needs of the future.

The effect of dark energy plays a role in the expansion of the universe.

Understanding dark energy can be difficult.

Dark energies can contribute to the expansion of the universe.

Our energies are running out.

Atomic energy can play an important role in meeting our future energy needs.

That energetic child always runs and plays around.