Energy is used as a basic factor for producing goods and services in the industrial and commercial sector globally and is also a vital commodity for our daily life, providing heating, cooling, cooking, transportation and the means for other activities. The use of energy is, however, a polluting activity with many externalities that are not taken into account in its final price. In fact, the conversion of primary energy (predominantly fossil fuels) to the various forms of final energy emits carbon dioxide (CO2), which is one of the greenhouse gases (GHG) responsible for global warming.