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For the analysis of economic interdependences form an environmental perspective, a condensation of the information contained in input-output (IO) tables is desirable, but without much loss of the quantitative dimension. For the case of total energy requirements, main contributions identification is presented as an approach that allows a partitioning of total energy requirements by production layers and (final) energy-consuming sectors. For this purpose, a mixed monetary-energy IO model and a partitioning procedure are used. In addition, minimal flow analysis as a graphical method is used to detect importnant energetic interconnections. Environmentally Important Intersectoral FlowsEnergy, environment, main contributions identification, minimal flow analysis,