Question

Which of the following alternative energy sources in not inexhaustible

Answer 1

Exhaustible is something that can be used up completely. Everything is exhaustible except solar power, wind power, tidal and wave power.

Exhaustible is anything that we find under the ground. Thermal power comes from deep under the earth. The dynamo that is our earth's core will eventually quit producing usable heat for those ancestors of ours and will likely go the way of mars, a geographically dead planet that no longer has the ability to re-shape its surfaces through its own core's energy.