Plots of land are becoming scarce in heavily populated areas. In addition, there is a conflict regarding different uses of land for ecosystem preservation, agriculture/forestry, raw material extraction, traffic infrastructure, housing or leisure activities. In this context, brownfield development becomes a major issue for a sustainable progress of societies. This poses risks for investors regarding existing pollution and future costs related to potential land contamination. Arne, with his consulting company ecoconsultants, accompanies clients in assessing the current state, potential land contamination prior to transfer of property, and the development of clean-up strategies. For clients operating industrial sites and performing IPPC-activities (Integrated Pollution Prevention and Control), Arne also provides baseline reports according to the EU Industrial Emission Directive and, if needed, also closure reports as preservation of evidence for leaving sites without contamination.