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Assessing CO 2 Reduction Effects Through Decarbonization Scenarios in the Residential and Transportation Sectors: Challenges and Solutions for Japan’s Hilly and Mountainous Areas

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  • Xiyue Hao

    (Graduate School of Environmental, Life, Natural Science and Technology, Okayama University, 1-1-1, Tsushima-naka, Kita-ku, Okayama 700-8530, Japan)

  • Chuyue Yan

    (Department of Socio-Environmental Energy Science, Graduate School of Energy Science, Kyoto University, Yoshidahonmachi, Sakyo-ku, Kyoto 606-8501, Japan)

  • Daisuke Narumi

    (Graduate School of Environmental, Life, Natural Science and Technology, Okayama University, 1-1-1, Tsushima-naka, Kita-ku, Okayama 700-8530, Japan)

Abstract

Depopulation, aging, and regional decline are becoming increasingly serious issues in Japan’s hilly and mountainous areas. Focusing on mitigating environmental damage and envisioning a sustainable future for these regions, this study examines the potential for reducing CO 2 emissions in the residential and transportation sectors by 2050. Bottom-up simulations were used to estimate CO 2 emissions. Subsequently, six decarbonization scenarios were formulated, considering various measures from the perspectives of population distribution and technological progress. Based on these scenarios, this study analyzes changes in future population, energy consumption, and CO 2 emissions by 2050. The results of this study show the following. (1) Depopulation and aging problems in these regions are expected to become more severe in the future. It is necessary to take action to promote sustainable regional development. (2) Pursuing decarbonization has a positive impact on enhancing regional sustainability; however, maintaining the intensity of measures at the current level could lead to a reduction of only 40% in CO 2 emissions per capita by 2050 compared with 2020. (3) Scenarios that strengthen decarbonization measures could achieve a reduction of over 95% by 2050, indicating that carbon neutrality is attainable. However, this will require implementing measures at a higher intensity, especially in the transportation sector.

Suggested Citation

  • Xiyue Hao & Chuyue Yan & Daisuke Narumi, 2024. "Assessing CO 2 Reduction Effects Through Decarbonization Scenarios in the Residential and Transportation Sectors: Challenges and Solutions for Japan’s Hilly and Mountainous Areas," Sustainability, MDPI, vol. 16(23), pages 1-25, November.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:23:p:10342-:d:1529887
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