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2. EPA, 2010. Renewable Fuel Standard (RFS), Environmental Protection Agency, Washington, available in http://www.epa.gov/otaq/fuels/renewablefuels/, (consulted in March 2013)
3. EPE, 2011. National Energy Balance, Empresa de Pesquisa Energética, Ministério de Minas e Energia, Brasília (in Portuguese).
4. FAO, 2009. Global Agriculture Towards 2050. Paper Prepared by the High-level Expert Forum for the Conference How to Feed the World by 2050. Food and Agricultural Organization, Rome, October 2009.
5. FAO, 2011. The State of the World's Land and Water Resources for Food and Agriculture (SOLAW)—Managing Systems at Risk. Food and Agriculture Organization of the United Nations, Rome and Earthscan, London.