Abstract
Summary: A mathematical model ofthe material and energy flows in the chemical manufacturing industries was used to evaluate trade‐offs between cost and chlorine use in chemical manufaduring. The model was also used to assess the impact that new technologies could have on chlorine use. Although the cost data in the model were subject to considerable uncertainty, the results did provide general guidance in choosing chemical manufacturing technologies that reduce chlorine use in a cost‐effective way More significant, the modeling demonstrates that material flow data can play a critical role in assessing the environmental implications of industrial systems.

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