The ZEPEuropean Technology Platform for Zero Emission Fossil Fuel Power Plants has recently published a study on CO2Carbon dioxide storage(CO2) A process for retaining captured CO2, so that it does not reach the atmosphere costs (ZEPEuropean Technology Platform for Zero Emission Fossil Fuel Power Plants, 2011). As external cost data proved scarce and the development of a generic model prohibitive from a time and resources perspective, the ZEPEuropean Technology Platform for Zero Emission Fossil Fuel Power Plants study utilised the technical and economical knowledge of ZEPEuropean Technology Platform for Zero Emission Fossil Fuel Power Plants members with substantial research and experimental experience in the area of CO2Carbon dioxide storage(CO2) A process for retaining captured CO2, so that it does not reach the atmosphere and associated costs. A "bottom-up" approach, based on potentially relevant cost components, was taken and data consolidated into a robust and consistent model. Owing to the varied representation within the group and the use of external parties for review, all data and assumptions were challenged, vetted and verified by the principle of consensus (IEAGHG, 2012).