Access to energy in developing countries is a key problem. In compliance with the proclamation of 2012 as International Year of Sustainable Energy for All by the General Assembly of the United Nations, in recognition of the importance of access to energy for sustainable economic development and to the achievement of the Millennium Development Goals Millennium [1] . Nowadays, despite the declarations and commitments, the numbers show a dramatic situation: 1.4 billion people lack access to electricity, an additional one billion do not have reliable electricity grid and 2.7 billion people rely on traditional biomass for cooking and lighting. More than 95% of these people is concentrated in sub-Saharan Africa area or developing regions in Asia and 84% of them are located in the rural areas. Such failures are due and increase the " In order to make more immediate the understanding of state of development of a country, some international institutions such as UNDP (United Nations Development Program) and IEA (International Energy Agency) have formulated indicators for human and energy dimension. These indicators are the Human Development Index (HDI) and the Energy Development Index (EDI). The indicator that we will consider is the EDI. The EDI was created in 2004 by the IEA in order to better understand the role that energy plays in human development. With this indicator is possible to follow the progress of a country in its transition to modern fuels and more performing way to produce energy. EDI is constituted by the composition of four indicators, each of which captures various aspects of energy poverty. These sub- indicators are:
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