The Solar Tower
SEVILLE, SPAIN - APRIL 24: View of the reflectors at the PS10 solar tower plant at Sanlucar la Mayor outside Seville on April 24, 2007 in Seville, Spain. The solar tower plant, the first commercial solartower in the world, by the Spanish company Solucar (Abengoa), can provide electricity for up to 6,000 homes. Solucar (Abengoa) plan to build a total of 9 solar towers over the next 7 years in Sanlucar la Mayor to provide electricity for an estimated 180,000 homes. (Photo by Denis Doyle/Getty Images)