Data source(s) used: Energy use data reported in physical environmental accounts are calculated starting from a plurality of sources elaborated in particular by: Ministry of Economic Development (National Energy Balance - BEN; Quarterly Oil Bulletin), Terna (Annual Report on Electricity in Italy; Consumption of electricity by type of activity and type of market), Unione Petrolifera (Economic, energy and environmental statistics), ACI (fleet of vehicles), the Bank of Italy (international maritime transport), Istat (Survey on energy consumption - COEN, carried out in 2013 by Istat-MISE-ENEA; Agriculture Economic accounts; Survey on air transport).
Other data characteristics: Data on energy use are gross of transformations, i.e. the energy incorporated in the products used to be transformed into other energy products is also counted in the various uses of the derivative products (for example, the energy counted in the crude oil used to produce motor gasoline is recounted in the use of petrol for transport; the energy incorporated in the products used for the production of electricity is also counted in the phase in which the electricity itself is used; etc.). This results in a phenomenon of double counting of the same energy in different phases of the economic cycle (basically during production/processing phase and consumption phase), that is most relevant, the more the data are aggregated (by type of energy product, by type of use and/or by economic activity). It follows that:- for economic activities as a whole, the 'total use of energy products' is strongly affected by double counting, however, if we consider the individual types of energy use, the data do not present the phenomenon of double counting in the case of 'heating', 'transport', 'transformation into electricity' and 'non-energy use', while the phenomenon does occur, marginally, in the case of 'other energy use with combustion' and 'energy use without combustion';- for individual economic activities, the same considerations as for economic activities as a whole are valid, but the disaggregation by activity considerably attenuates the phenomenon of double counting of energy;- for households, the figures are not affected by double counting as households do not perform any type of transformation of energy products.: Terajoule