On Thu, May 31, 2012 at 3:55 PM, Jed Rothwell <[email protected]> wrote:
> The power density of solar cells is low but as long as they are cheap it > does not matter. (Energy density is meaningless in a solar cell or wind > turbine; the energy will last for billions of years.) We are not running out > of space on the roofs of houses, or in the deserts of the southwest. http://en.wikipedia.org/wiki/Solar_shingles Another idea I toyed around with in my youth was solar asphalt on highways. Not at all slippery, great traction . . . dry. :-) T
