The project “Kosie” aims to create a planning basis for a knowledge-based management of natural CO2 storage in sealed and unsealed soils. For this purpose, soil studies are carried out on areas in Berlin and a soil history database is established. The results of the evaluation and evaluation of the soil data are presented in a user-friendly brochure. The results of the project supported the objectives of the BEK 2030 and create incentives to reduce soil sealing and to implement de-sealing and compensatory measures in the interests of environmental and climate protection.”