- Energy statistics
Energy statistics refers to collecting, compiling, analyzing and disseminating data on commodities such as
coal ,crude oil ,natural gas ,electricity , or renewable energy sources (biomass , geothermal, wind or solar energy), when they are used for the energy they contain.Energy is the capability of some substances, resulting from their physico-chemical properties, to do work or produceheat . Some energy commodities, calledfuels , release their energy content as heat when they burn. This heat could be used to run an internal orexternal combustion engine .The need to have
statistics on energy commodities became obvious during the1973 oil crisis that brought tenfold increase inpetroleum prices . Before the crisis, to have accurate data on global energy supply and demand was not deemed critical. Another concern of energy statistics today is a huge gap in energy use between developed and developing countries. As the gap narrows ("see picture"), the pressure on energy supply increases tremendously.The data on energy and electricity come from three principal sources:
*Energy industry
* Other industries ("self-producers")
* ConsumersThe flows of and trade in energy commodities are measured both in physical units (e.g.,metric ton s), and, whenenergy balance s are calculated, in energy units (e.g.,terajoule s or tons of oil equivalent). What makes energy statistics specific and different from other fields ofeconomic statistics is the fact that energy commodities undergo greater number of transformations (flows) than other commodities. In these transformations energy is conserved, as defined by and within the limitations of the first and second laws of thermodynamics.ee also
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World energy resources and consumption External links
* [http://www.iea.org/Textbase/stats/index.asp International Energy Agency: Statistics]
* [http://unstats.un.org/unsd/energy/default.htm United Nations: Energy Statistics]
* [http://www.ssb.no/english/conference/ocg The Oslo Group on Energy Statistics]Publications
* [http://unstats.un.org/unsd/energy/yearbook/EYB_pdf.htm Energy Statistics Yearbook 2004, United Nations, 2006]
* [http://unstats.un.org/unsd/energy/balance/EBEP_pdf.htm Energy Balances and Electricity Profiles 2004, United Nations, 2006]
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