Urban Baltic Industrial Symbiosis focuses on initiating industrial symbiosis in order to make use of energy and other resources that would otherwise go to waste. Thus, emission of hazardous substances to environment and humans will be reduced. Industrial symbiosis is a known concept but the knowledge and experience varies accross the region, and it has not yet been approached in a systematic manner in most regions. We have identified a number of sites with symbiosis potential in the programme area, and will use four of them as pilot symbiosis plant in the project. Input will be experiences from existing symbiosis sites, where dramatic savings have been realized. The experience and learning from the existing plants and in the pilots will be documented in a set of tools for industrial symbiosis, which can be used by others also after the project. The tools will include analysis of symbiosis potential, best practices, business and funding models. The project will focus on cross-border experience exchange, critical to success due to the differences in experiences and knowledge of symbiosis in the programme area. All partners can learn from each other and by understanding the different situations in countries around the South Baltic. Due to the diversity of national settings and to the differences in terms of industries and of resources that are traded, and a number of other variables that influence contractual terms, a number of models will be needed. The goal of the project is to provide tools, implement five pilot projects and carry out activities to spread the project results and support and inspire new symbiosis projects. Since the business aspect is included in the tools, we expect sustainable symbiosis cases, and thus longterm effects on reduced pollution discharges.