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ホーム > Journal of Environmental Information Science > Vol.38 No.5 (2010年) > A Study on Energy Intensity and CO2 Emissions in Transportation Industry

Journal of Environmental Information Science Vol.38 No.5 (2010年)

[pp.11-20]

A Study on Energy Intensity and CO2 Emissions in Transportation Industry

Masaru KUMAI, Yoshikuni YOSHIDA and Ryuji MATSUHASHI (The Japan Research Institute / The University of Tokyo)


Abstract:
The revised Rationalization in Energy Use Law came into effect in 2006 and consequently all transportation companies are obliged to report the amount of energy use to the government in Japan. This study clearly shows the value of energy intensity and CO2 emissions by analyzing the reported data of the energy use amount. As for CO2 emissions in transportation industry, we achieved a regression analysis which treated the mileage, the ton-kilomater, the transportation capability and the transportation output as individual explaining variables respectively by category. The study also declares that the energy intensity is improved with the increase of mileage and ton-kilomater in all transportation divisions while such tendency is hardly seen in the transportation capability and output. The study analyzes energy intensity variance between large-scale and smaller companies, and the differences of energy intensity were larger in the group of smaller companies than in that of large-scale. Finally, we proposed a system that uses the characteristics of energy intensity and CO2 emissions from transportation companies.


Key Word:
transportation industry, energy intensity, CO2 emission, regression analysis

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