Auswirkungen der Berechnung der funktionellen Einheit in derudMilchproduktion auf das Ergebnis von Ökobilanzen

摘要

Life cycle assessment (LCA) allows systematic comparisons of environmental performance between different products. The functional unit in LCA for milk production is typically set to 1 kg energy corrected milk. This does not however suffice as definition to allow for comparing different studies. The definition of reference flow can introduce a bias between organic and conventional farming systems. We strongly encourage to include definition of reference flow calculation, choice of algorithm for energy calculation as well as choice of energy content of milk in the communication of any results.