Ionela-Claudia, Dina; Lucia, Popa-Paliu - In: Annals - Economy Series 4.I (2010) December, pp. 107-114
economic branch, and is also a branch with high importance to the economy and social life of any country. This branch, which … entire modern world civilization, began to develop only towards the late of the XX-th century. Electricity is an energy form …. Coal maintained a vital role in the total energy sources, especially by ensuring price stability which is a major and …