Abstract
In the recent environmental problems, reuse system of waste and by-product should be one of the most effective countermeasures. However, few evaluating method of environmental loading could indicate the advantage of reusable materials. We investigated on an evaluating method for the availability of effective utilization of some waste and by-product. Firstly, we expressed the allocation of the environmental loading by combining quantity of materials with their economic values. As a case study, we made a model for the material flow around the cement industry in 1990. In that model, the carbon dioxide emission and the drying up of limestone resources were considered as environmental loading. After the model analysis, we could estimate a reduction effect of the environmental loading by effective utilization of some waste and by-product in the cement industry.
