This paper mainly analysis the change by the Logarithmic mean Divisia index method on the emission of carbon dioxide deduced by passenger cars in Japan. Decomposition analysis is a method that analyzes the effects lead to the change of the emission of carbon dioxide. Based on this method, the analysis of the emission of passenger cars in recent years is done to explain the changes. It is found that the car number in advanced regions in Japan rises successfully every year and affects the carbon dioxide emission crucially and steadily. Population is another effect that brought in great emission at the time which in high speed of economic growth, yet the travel distance by passenger cars is decreased and does negative effect to the emission. Based on the result of this analysis, corresponding strategy such as restricting the use of cars and promoting public transportation is proposed.
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