ENVIRONMENTAL SCIENCE
Online ISSN : 1884-5029
Print ISSN : 0915-0048
ISSN-L : 0915-0048
Volume 27, Issue 6
Displaying 1-3 of 3 articles from this issue
Articles
  • Hakaru IGUCHI, Xiao Yun WU, Toshi H. ARIMURA
    2014 Volume 27 Issue 6 Pages 347-353
    Published: November 28, 2014
    Released on J-STAGE: December 10, 2015
    JOURNAL FREE ACCESS
    Recently, it is pointed out that environmental practices of SME are not carried out compared to large enterprises. This difference results from the fact that SMEs are exempt from environmental regulations. Thus it is necessary for SMEs to deal with environmental problem voluntary. In this study, we focus on ISO14001, which is a type of voluntary environmental practices recognized around the globe. We analyze if there are different incentives for acquiring ISO14001 certification and compare the improvements in environmental performance, between SME and large enterprises.
    We find that the main region of sales does not affect ISO14001 certification for large enterprises, although SMEs' main region of sales affect ISO 14001 certification. In addition, SMEs have lower incentives to adopt ISO14001 certification than large enterprises. However, there is no difference in environmental performance between SMEs and large enterprises. The results also implied that support from the local governments for adopting ISO14001 is an effective measure that facilitates SMEs’ voluntary environmental practices, which improves their environmental performance.
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  • Nobuhiro KANAZAWA, Yoshiaki SHIMAZAKI, Atsushi OGAWA, Yoshihiro KANETA ...
    2014 Volume 27 Issue 6 Pages 354-361
    Published: November 28, 2014
    Released on J-STAGE: December 10, 2015
    JOURNAL FREE ACCESS
    Since the wastewater from swine farm contains considerable amount of nitrate-nitrogen, an appropriate treatment for the wastewater is necessary. However, the high cost of treatment makes the task uneasy. To solve this problem, we propose an environment-friendly recycling system for the wastewater by producing liquid swine manure (LSM) using a simple aeration process and by utilizing the LSM for rice cultivation. This study carries out substantiative experiments of wet-rice cultivation using the LSM, and especially evaluates the economical sustainability. A series of cultivation experiments between using the LSM and conventional chemical fertilizer shows that there were some differences in timing and strength in affecting the growth between them, but the yield differences were negligible. Further, an economic evaluation revealed that the use of the LSM saves approximately 2,000 yen per 10 ares. Questionnaire survey in the tasting events revealed that samplers’ impression of the rice grown with the LSM was good, and the rice was valued 7.6% higher on average than the price of the conventional rice. The economic gain estimated from the survey is approximately 7,000 yen per 10 ares.
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Technical Note
  • Naota HANASAKI, Kiyoshi TAKAHASHI, Yasuaki HIJIOKA, Hiroyuki KUSAKA, T ...
    2014 Volume 27 Issue 6 Pages 362-373
    Published: November 28, 2014
    Released on J-STAGE: December 10, 2015
    JOURNAL FREE ACCESS
    The extent of climate change effects ranges widely. In order to make comprehensive assessments of the impacts of climate change and to formulate adaptation policies, interdisciplinary research must be implemented under common future assumptions (hereafter common scenarios). In this paper, a common scenario for Japan is proposed using the latest climate and population projections. We used the climate projection of four climate models and three radiative forcing scenarios of the Coupled Model Intercomparison Project Phase 5 (CMIP5). We utilized the results of dynamical downscaling using a regional climate model which is consistent with one of the global scenarios. We developed nine population projection scenarios taking into account the spatial distributions of population. We proposed land-use scenarios compatible with these population projections. By conducting multi-sectoral research on climate change impacts and adaptation, the entire picture of the impacts of climate change on Japan will be revealed.
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