環境共生
Online ISSN : 2434-902X
Print ISSN : 1346-3489
最新号
選択された号の論文の7件中1~7を表示しています
巻頭言
原著論文 審査付
  • 川廷 昌弘 , 黛 陽子 , 根本 和宜, 杉浦 正吾 , 水野谷 剛
    原稿種別: 研究論文
    2022 年 38 巻 2 号 p. 154-166
    発行日: 2022/09/30
    公開日: 2022/10/19
    ジャーナル フリー

    This study focuses on the fact that CSR communication using the SDGs is actively being undertaken in Japan, and clarifies the awareness of those in charge of promoting strategic CSR. A questionnaire survey on "awareness of the use of SDGs" and "awareness of the use of SDG icons" was conducted among corporate representatives participating in the Global Compact Network Japan, resulting in 81 responses. Three hypotheses were formulated, and simple tabulation was conducted, followed by factor analysis and multiple regression analysis. In conclusion, it became clear that CSR managers who have a sense of crisis that if they do not use the SDGs to communicate their corporate stance, they will not be expected by the next generation and will not be able to survive, are conducting CSR communication using the Japanese version of the SDG icons, which are easy to understand and communicate.

  • 金子 愛里, 松本 亨 , 伊坪 徳宏 , 蛯江 美孝 , Irvan , SARAH Maya , HASIBUAN Novrida Ha ...
    原稿種別: 研究論文
    2021 年 38 巻 2 号 p. 167-175
    発行日: 2021/07/19
    公開日: 2022/10/19
    ジャーナル フリー

    Since the Sustainable Development Goals (SDGs) were set up in 2015, private companies have been accelerating their efforts on SDGs. Also, as more investors make their decision based on Environmental, Social, and Governance (ESG) criteria to evaluate companies, private companies are required to show their efforts on ESG quantitatively. To achieve SDGs Goal 6 “Ensure availability and sustainable management of water and sanitation for all,” private companies, especially based in developing countries, are required to appropriately treat domestic wastewater. However, it is indicated that conventional septic tanks emit a large amount of greenhouse gas (GHG) as well as discharge effluent containing high BOD directly into the environment. To improve the wastewater treatment system, Japanese Johkasou systhem is expected to be installed instead of conventional septic tanks. A previous research1) shows that GHG emission from septic tank is 1.8 times higher than Johkasou. However, other than GHG, other environmental impact also need to be considered to respond to SDGs and ESG. This study conducted to investigate and compare the environmental impact of two types of on-site domestic wastewater treatment systems installed in factories in Indonesia, a conventional septic tank and a Johkasou. The methodology used for the impact assessment was LIME3. As a result, the environmental impact of the entire life cycle of the septic tank was 1.04 USD per person per year and 0.47USD for Johkasou. Both have the largest environmental impact at the stage of operation, but the main factors were different. As for septic tank, CH4 emission from the wastewater treatment accounts for about 71% of the total emission, on the other hand, Johkasou emits about 55% of CO2 from power consumption used for a blower. The result shows there are possibility to reduce 55% of the environmental impact if Johkasou is installed instead of conventional septic tank.

  • 山下 奈穂 , 橋本 征二 , 白川 博章 , 谷川 寛樹
    原稿種別: 研究論文
    2021 年 38 巻 2 号 p. 176-187
    発行日: 2021/11/22
    公開日: 2022/10/19
    ジャーナル フリー

    The 4th Fundamental Plan for Establishing a Sound Material-Cycle Society aims to achieve exhaustive resource use though the development of new methods and indicators considering all stages of material lifecycle. In this study, material flow and stock analysis of non-metallic mineral resources and its compilation to physical input output table are conducted for the period 1990 to 2015. Also, the results are applied to 6 material flow indicators to discuss the efficiency in each stage of lifecycle. According to the results, the amount of direct material input has decreased since 1990, while the amount of domestic processed output has relatively increased in recent years. It was also found the recovery rate of used products has been over 90% since 2003. This indicates the utilization of used materials has been consistently promoted although the amount of outflow from used products has increased. The difference between the amount of outflow from statistics and estimates implies that there is a certain amount of so-called missing stock such as obsolete stock and dissipated stock. These stocks could be great concern in terms of its impact on material use time and future waste generation.

  • 和解生態学の視点から
    村上 健太郎
    原稿種別: 研究論文
    2022 年 38 巻 2 号 p. 188-199
    発行日: 2022/09/30
    公開日: 2022/10/19
    ジャーナル フリー

    Hard landscape elements, such as walls, building gaps, or road pavement seams (i.e., hardscape), can provide habitats for ferns and lycophytes. In this study, ferns growing on hardscapes in the urban roadside environments from Kanto to Tohoku, Japan, were investigated. This study aimed to determine which type of hardscape is the preferred habitat of ferns, examine the climatic factors that influence the differences in species composition, and discuss the potential use of hardscapes based on the above two findings and reconciliation ecology. Results showed that the dominant fern species in hardscape habitats in Kanto and Tohoku shifted from Pteris multifida and Anisocampium niponicum to Athyrium yokoscense, with a lower average annual temperature or Warmth Index of Kira. In the study areas, most hardscape habitats were found in building gaps than on stone walls, walls, or road pavement seams. In examining the species-specific preferences of hardscape habitats, wall-preferring species were more common in this study. The high number of building gaps as hardscape habitats and the relative abundance of wall-preferring species are likely characteristics of Japan’s urban fern habitats under a cool-temperature climate. Any species rare enough to be listed in the National Red Data Book were not identified, but some rare species listed in plural local Red Data Books were recorded, such as Asplenium scolopendrium. This suggests that the use of hardscapes should be considered for the conservation of these species. While discussing the results of this study from the viewpoint of reconciliation ecology, it is recommended to build masonry walls in gardens or create humid building gaps for each household to facilitate the growth of these rare species.

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