Spiegel Online By Nicolai Kwasniewski, April 03, 2013 Mansour Cherni is one of the people who don't fit into this image of a densely populated Europe powered by sunlight from the largely deserted Sahara. The Tunisian trade unionist attended the World Social Forum 2013 (WSF), a five-day event held in Tunis in late March. "Where will the energy produced here be used?" he asked. "Where will the water come from that will cool the solar power plants? And what do the locals get from it all?"