The objective of this study is to analyze the evolution of the Brazilian energy sector with reference to the results of the business-as-usual scenario of the National Energy Outlook 2030 studies. The analysis was made with, as a starting point, energy indicators for sustainable development, which take into account social, economic and environmental aspects. The study demonstrates that the country has great availability of energy resources and that renewable sources can contribute to maintain a big participation in the production and use of energy, giving the country considerable advantages in economic and environmental terms. As regards the social aspect, on the other hand, the unequal distribution of income continues to be the country's principal weak point in achieving sustainable development. (c) 2007 Elsevier Ltd. All rights reserved.