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trends and future of sustainable development - TransEco

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%India, factors affecting CO 2 emissions6005004003002001000-100-2001973-19801973-19901973-20011973-2007-300-400-500CO2/TPES TPES/FEC FEC/GDP GDP/POP POP Total CO2changeFigure 1. The effects affecting CO 2 emissions in India during the periods 1973-1980, 1973-1990,1973-2001 <strong>and</strong> 1973-2007.Identifying the factors behind change in CO 2 emissions from fuel combustion is based on thepartition presented in the following equation:CO2CO2 TPESTPESFECFEC GDPGDP POPPOPwhereCO 2 is carbon dioxide emissions from fuel combustion;GDP is gross domestic product in real prices;TPES is total primary energy supply (including all fuels <strong>and</strong> other forms <strong>of</strong> primary energy, i.e.before the combustion process <strong>and</strong> transfer <strong>and</strong> distribution <strong>of</strong> electricity or heat;FEC is final energy consumption, i.e. consumption <strong>of</strong> energy carriers such as district heat <strong>and</strong>electricity, <strong>and</strong> fuels used in residential heating <strong>and</strong> transport;POP is the amount <strong>of</strong> population.As a result, five different factors contributing to the change in CO 2 emissions are identified in a waythat their sum equals to the total change. For the studied four time periods, all factors are calculated as apercentage <strong>of</strong> the base year (1973) value. Each bar describes the amount <strong>of</strong> corresponding factorcontributing to the change in CO 2 emissions during the studied time period.The first factor, CO 2 /TPES-factor, refers to the contribution <strong>of</strong> change in CO 2 intensity <strong>of</strong> theprimary energy supply, which is influenced by switch from one energy form to another. Positive valuesfor this factor in Figure 1 imply a switch from fuels with low carbon content to energy sources withhigher carbon content, e.g. from fuelwood to coal <strong>and</strong> petroleum products. Negative values would implya decreasing effect to CO 2 emissions due to the opposite switch.The second factor, TPES/FEC-factor refers to the efficiency <strong>of</strong> the energy transformation system, i.e.efficiency in transforming primary energy into different energy carriers such as electricity or heat. Thiscan be influenced by e.g. switch from fuel use to electricity or vice versa, or technological changes in the471

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