> > One way to make solar cells more efficient is to find a material that > will capture energy from a large portion of the spectrum of > sunlight -- from infrared to visible light to ultraviolet. > I don't think this is _the_ problem for groundhogs. The problem is [or was?] that the cost to assemble a solar cells is higher than the cost of the energy it produces. So it's economically viable to put solar cells in satellites, but nothing else.
Alberto Monteiro
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