than 10 times the size of Belo Monte's, flood 30 times the area submerged by Belo Monte, indigenous territories of the Araweté/Igarapé Ipixuna, Koatinemo, Arara, Kararaô, and Cachoeira Seca do Irirí natives. Due to the project's lack of economic viability and lack of interest from private investors, the government has had to rely on pension funds and lines of credit from BNDES that draw from the Workers' Assistance Fund, oriented towards paying the public debt, to finance the project; up to one-third of the project's official cost would be financed by incentives using public money. Alternatives WWF-Brazil released a report in 2007 stating that Brazil could cut its expected demand for electricity by 40% by 2020 by investing in energy efficiency. The power saved would be equivalent to 14 Belo Monte hydroelectric plants and would result in national electricity savings of up to R$33 billion (US$19 billion). Ex-director of ANEEL Afonso Henriques Moreira Santos stated that large dams such as Belo Monte were not necessary to meet the government's goal of 6% growth per year. Rather, he argued that Brazil could grow through increasing its installed capacity in wind power, currently only at 400 MW. However, a study by the Federal University of Rio de Janeiro, published in June 2011, criticised some of these alternative suggestions and defended the Belo Monte dam project. They state that compared to the estimated costs of alternative energies, the Belo Monte dam is cheaper both in economic and in socio-environmental costs. Environmental effects The project is strongly criticized by indigenous people and numerous environmental organizations in Brazil plus organizations and individuals around the world. Belo Monte's of reservoir will flood of forest, about 0.01% of the Amazon forest. Though argued to be a relatively small area for a dam's energy output, this output cannot be fully obtained without the construction of other dams planned within the dam complex. The expected area of reservoir for the Belo Monte dam and the necessary Altamira dam together will exceed 6500 km2 of rainforest. The environmental impact assessment written by Eletrobras, Odebrecht, Camargo Corrêa, and Andrade Gutierrez listed the following possible adverse effects The loss of vegetation and natural spaces, with changes in fauna and flora; Changes in the quality and path of the water supply, and fish migration routes; Temporary disruption of the water supply in the Xingu riverbed for 7 months; Incomplete environmental assessment In February