Sun and Wind. You always know that the next morning sun and wind will be here…and if they aren’t then we probably wont be either! It is true that as of right now we do not harvest the energy to its full potential. But when you add on knowing that they are reliable sources, with no real drawbacks, you have to say that they are the most efficient.
Carsen, I’d have to agree with keith. Solar and wind energy are two relatively constant factors, specifically ones that have a virtually unlimited supply of resources. Hope I helped, and have a green day!
The most efficient renewable energy source is actually Hydroelectric. Water is about 800 times denser than air, so the output of a hydroelectric turbine is greater than that of a wind turbine in a similar proportion. Hydroelectricity uses gravity as the source of energy, and Mother Nature replenishes the water supply through rain and snow. Solar power is expensive and though it is a very plentiful source of energy, the output of a solar cell is not much.
Unfortunately, hydroelectricity is bad for the health of rivers and their wildlife. Maybe tidal generators are up next?
I believe the msot efficient energy source potential is actually algal fuel. It still has yet to be adopted in mass production, but companies are beginning to realize it’s capabilities. A great book to provide information is “Green Algae Strategy: End Oil Imports and Engineer Sustainable Food and Fuel” by Mark Edwards.
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