Photo Gallery: Solar Energy from Africa 06/16/2009
  The left square, labelled "world," is around the size of Austria. If that...
TREC

The left square, labelled "world," is around the size of Austria. If that area were covered in solar thermal power plants, it could produce enough electricity to meet world demand. The area in the center would be required to meet European demand. The one on the right corresponds to Germany's energy demand.