A worker occupies the central control station of the Itaipu Hydroelectric dam, the world's largest, on the Brazilian side of the border with Paraguay, in Foz do Iguacu, September 20, 2007. The Itaipu Hydroelectric Power Plant, the largest in production energy in the world, is an enterprise jointly developed by Brazil and Paraguay in the Parana River. The installed power of the Plant is 14,000 MW (megawatts), with 20 generating units of 700 MW each.
REUTERS/PAULO WHITAKER