In the first half of 2008, under the coordination of the MME, the Ten Year Energy Expansion Plan - PDE 2007/2016 was published, a planning instrument that prioritizes the programming of works related to the physical expansion of the country&#39;s energy systems on the horizon of the next 10 years. The study predicts that, between 2007 and 2016, 34,460 MW will be added to the system in new hydroelectric plants and an amount of BRL 90 billion will be invested between 2010 and 2016, characterizing a mostly water expansion. The PDE deals with regional issues and places special emphasis on the treatment of socio-environmental issues, within the perspective of sustainable development, aiming to ensure quality and reliability to the country&#39;s energy supply.