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The metals contained in various mobile phones were analyzed. More than 20 elements were detected and their net amounts were found to increase year by year. The environmental and economic impacts were assessed based on an elemental analysis. The CO2 emissions generated by the incineration of plastics were estimated to be almost the same as those avoided by recovering the metals. Gold had the biggest...
Material in-use stock, which represents a future potential of material recovery and waste, is an important factor in analysis of resources recycling. In-use stock is usually estimated using some statistics. In developing countries, however, such statistical data is not usually available to estimate in-use stock of materials. Therefore an alternative method is required in these countries. In this paper,...
The environmental, social and economic impacts of videoconferencing in the USA and Japan were evaluated and compared quantitatively. For this purpose we used a new index, named the ldquogross social feel-good (GSF) indexrdquo, which was developed for evaluating both the positive and negative effects of ICT services. The impacts of videoconferencing in the two countries were different especially as...
A new index is developed for evaluating the contribution of ICT services to the realization of a sustainability society. This new index, named the gross social feel-good (GSF) index", allows us to evaluate both the positive and negative effects of ICT services in terms of their environmental, social and economic influences. In addition, the GSF index includes a happiness index that indicates...
We determined the material flow of a Japanese telephone corporation. We used a modified input-output table intended for LCA and found that the calculated annual input flow in weight was 93% compared with the annual output flow. This result indicates the change in total assets. We suggest that we could use this method for calculating the macro material flow.
In recent years, a growing number of companies have been using eco-efficiency as an indicator of environmental performance in Japan. In 2006, Japan environmental efficiency forum developed the Information and Communications Technology (ICT) eco-efficiency evaluation guidelines, which activated implementation of eco-efficiency evaluations for ICT by Japanese industries. This presentation will focus...
This paper investigates the issues that need to be considered when comparing the environmental impacts of videoconferences and face-to-face meetings. The first part of this paper deals with how the total environmental loads including ripple effects were evaluated. The results show that about 80% less CO2 is emitted from a face-to-face meeting than from a videoconference. More than 95% of the CO2 emissions...
The extended environmental impact of e-learning was studied including ripple effects. E-learning changes the user's lifestyle and the various changes (ripple effects) were quantified by using an Internet questionnaire. The environmental burdens were evaluated with LCA and the results were shown as carbon dioxide (CO2) emissions. E-learning can reduce the CO2 emissions generated by conventional training...
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