Supply chains consist of all processes which are needed in order to supply customers with the
required products. Traditionally supply chain management decisions are based on the economic
performance of the involved parties. But in recent years other criteria such as quality
flexibility or the environment have become important as well. Especially carbon emissions are
high on the political agenda because they are considered to be a major cause of the greenhouse
gas effect. In this work it is shown how the performance of supply chains can be evaluated
considering both economic and environmental criteria. In particular the work deals with dual
sourcing in the context of the newsvendor model. The impact of environmental regulations
(emission taxes and emission trading) on the decisions of companies is analysed.
