Related:

• Renewable energy source for hot air balloons.
• A pollutant is an out of place resource.
• Wood is highly ecological, since trees are a renewable resource.
  If you cut down a tree, another will grow in its place....
• Dreams are renewable.
  No matter what our age or condition, there are still untapped possibilities within us and...
• Linux; a re-Gnu-able resource. -- Gareth Barnard
• Feminizts: A great untapped natural resource for doormats.
• Humor is our greatest natural resource. -- James Thurbe
• Cats are REAL ANIMALS!