Spiegel today has a long article, with accompanying photos and maps,on a project to build huge sun-power collecting units in the Saharan desert. Plants large enough to supply Europe with all the electricity it needs would occupy a minuscule fraction of the vast desert. In addition, it could fuel projects of desalinization of water to supply badly needed water. I've long wondered why we hear so little about desalinizing efforts, which, if successful,I would think one of the great technological and humanitarian achievements of the coming decades.