[LMB] Butter Bugs! Well, almost....

Andrew Barton andrew.157barton at btinternet.com
Fri Jun 27 02:02:32 BST 2008

Ed Burkhead:
> For practical purposes, I'd only count these things as energy sources:
1.  Sunlight
2.  Nuclear power
3.  Geothermal <
  One more: Gravity potential.  This is the source of HEP and tidal power.  HEP ultimately derives from solar energy (the sun drives the weather processes that carry water to high places) but tidal energy does not.

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