... solar films on buildings with enough left over to feed a surplus back into the grid. TF 20071113: I expected something very similar to this. I thought bricks (or other construction materials) could be mass made with photovoltaic capabilities. they'd be modular, so large walls would produce more energy. and they could be cheap, because even low efficiency technology would be enough to provide enough energy.. Happy! Future, come!

Scientists believe that this helium 3 could be used to create a new source of almost inexhaustible, clean, pollution-free energy on Earth. ... If we had gold bricks stacked up on the surface of the Moon, we couldn't afford to bring them back. This material - at several billion dollars a ton - is what makes it all worthwhile.