Hi Bob,

There are really only two sources of energy on Earth. The most predominant is the Sun which fuels our chaotic yet orderly weather system and our chaotic yet orderly ocean currents. The sun further fuels the biosphere through photosynthesis. The second is the Earth's internal heat which we fell at the surface in the form of vulcanism in all it's forms and tectonic events.

Basically, there is a constant stream of energy hitting the Earth all the time from the Sun and that powers the biosphere and all it's beautifully complex systems.

Bart.