A carbon footprint (CF), which is defined as the total direct and indirect GHG emissions caused by a person, event, organization or product, is an important tool to monitor the environmental impacts of our activities. The development of an international standard for the concept of a “carbon footprint” may facilitate input-output analysis of material flows and resources accounting at the corporation and/or national level. In 2008 the OECD hosted its second workshop on sustainable materials management and analysed the major initiatives on this topic within the public and private sector and in international organizations (OECD, 2008).