Some scientists from the Monash University discovered a potential way of producing renewable fuel from sand.
It may sound crazy, but the explanation lay on the fact that some micro algae called diatoms live among the sand grains. These creatures take sun light and transform it through metabolism to produce hydrogen gas.
Scientist hope that these type of microorganisms found at the Middle Park beach on Melbourne could also be present at different latitudes around the globe. Perhaps it would be a great source of sustainable energy, but I believe that many challenges will come, especially because living animals are so complex so efficiency will extensively vary.
In brief, any action aimed at the search for sustainable alternatives to produce green energy is worth and deserves to be studied.