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Indigenous Production

Indigenous Production is the production of primary energy, i.e. hard coal, lignite, peat, crude oil, NGLs, natural gas, nuclear, hydro, geothermal, solar and the heat from heat pumps that is extracted from the ambient environment. Production is calculated after removal of impurities (e.g. sulphur from natural gas).

Calculation of production of hydro, geothermal, etc. and nuclear electricity is explained in Section III, Units and Conversions of Energy Balances of OECD Countries of the IEA Statistics publications.