CO2 / TPES: This ratio is expressed in tonnes of CO2 per terajoule. It has been calculated using the Sectoral Approach CO2 emissions and total primary energy supply (including biomass and other non-fossil forms of energy).
CO2 / GDP: This ratio is expressed in kilogrammes of CO2 per 2000 US dollar. It has been calculated using the Sectoral Approach CO2 emissions and is shown with both GDP calculated using exchange rates and GDP calculated using purchasing power parities.
CO2 / population: This ratio is expressed in tonnes of CO2 per capita. It has been calculated using the Sectoral Approach CO2 emissions.
6. Main activity producers (formerly known as public supply undertakings) generate electricity and/or heat for sale to third parties, as their primary activity. They may be privately or publicly owned. Note that the sale need not take place through the public grid.
7. Autoproducer undertakings generate electricity and/or heat, wholly or partly for their own use as an activity which supports their primary activity. They may be privately or publicly owned.
Per capita CO2 emissions by sector: These ratios are expressed in kilogrammes of CO2 per capita. They have been calculated in two different ways. In the first ratio, the emissions from electricity and heat production are shown separately. In the second ratio, the emissions from electricity and heat have been allocated to final consuming sectors in proportion to the electricity and heat consumed by those sectors.
CO2 emissions per kWh: These ratios are expressed in grammes of CO2 per kWh. They have been calculated using CO2 emissions from electricity and heat as shown in the country tables in the rows "main activity producer electricity and heat" and "unallocated autoproducers", and electricity and heat output as described above.
In the first table on CO2 emissions per kWh, the CO2 emissions include emissions from fossil fuels, industrial waste and non-renewable municipal waste that are consumed for electricity and heat generation in the transformation sector and output includes electricity and heat generated from fossil fuels, nuclear, hydro (excluding pumped storage), geothermal, solar, biomass, etc. As a result, the emissions per kWh can vary from year to year depending on the generation mix.
In the ratios of CO2 emissions per kWh by fuel:
• Coal/peat includes primary and secondary coal, peat and manufactured gases (excluding gas works gas).
• Oil includes petroleum products (and small amounts of crude oil for some countries).
• Gas includes natural gas and gas works gas.
Note: Emissions per kWh should be used with caution due to data quality problems relating to electricity efficiencies for some countries.
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