2010, Brazilian environmental agency IBAMA granted an environmental license for the construction of the dam despite uproar from within the agency about incomplete information in the Environmental Impact Assessment (EIA) written by Eletrobras, Odebrecht, Camargo Corrêa, and Andrade Gutierrez. Previously in October 2009, a panel composed of independent experts and specialists from Brazilian universities and research institutes issued a report on the EIA, finding "various omissions and methodological inconsistencies in the EIA..." Among the problems cited within the EIA were the project's uncertain cost, deforestation, generation capacity, greenhouse gas emissions and in particular the omission of consideration for those affected by the river being mostly diverted in the long "Big Bend" (Volta Grande). Two senior officials at IBAMA, Leozildo Tabajara da Silva Benjamin and Sebastião Custódio Pires, resigned their posts in 2009 citing high-level political pressure to approve the project. In January 2011, IBAMA president Abelardo Azevedo also resigned his post. The previous president Roberto Messias had also stepped down, citing in April 2010 that it was because of pressure from both the government and environmental organizations. 140 organizations and movements from Brazil and across the globe decried the decision-making process in granting the environmental license for the dams in a letter to Brazilian President Luiz Inacio Lula da Silva in 2010. Loss of biodiversity The fish fauna of the Xingu river is extremely rich with an estimated 600 fish species and with a high degree of endemism. The area either dried out or drowned by the dam spans the entire known world distribution of a number of species, e.g. the zebra pleco (Hypancistrus zebra), the sunshine pleco (Scobinancistrus aureatus), the slender dwarf pike cichlid (Teleocichla centisquama), the killifish Anablepsoides xinguensis and Spectrolebias reticulatus, and the Xingu dart-poison frog (Allobates crombiei). An independent expert review of the costs of the dam concluded that the proposed flow through the Volta Grande meant the river "will not be capable of maintaining species diversity", risking "extinction of hundreds of species". Greenhouse gas budget The National Amazon Research Institute (INPA) calculated that during its first 10 years, the Belo Monte-Babaquara dam complex would emit 11.2 million metric tons of Carbon dioxide equivalent, and an additional 0.783 million metric tons of equivalent would be generated during construction and connection to the national energy grid. This independent study estimates greenhouse gas emissions of an amount that would require 41 years of optimal energy production from the