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The StratKIT Sustainability Toolkit provides a comprehensive set of practical tools and strategies to transition public catering services toward more sustainable practices. It focuses on eight 'Gateways' including organic food, plant-based diets, food waste reduction, and resource efficiency, while emphasizing the role of Green Public Procurement (GPP) as a primary driver for systemic change in the food supply chain.

The report assesses the feasibility of a trading system to combat eutrophication in the Baltic Sea, arguing that current approaches are too slow to meet EU Water Framework Directive targets.

The document outlines eight categories of barriers to climate change adaptation—ranging from conflicting timelines and lack of resources to institutional constraints and climate skepticism—and provides a self-assessment questionnaire and a directory of resources to help local authorities implement adaptation measures.

The document identifies eight categories of barriers to climate adaptation: conflicting timescales/interests, leadership, resources, science, governance/institutional constraints, lack of awareness/communication, attitudes/values/motivations, and the adaptation process itself. It provides a self-evaluation survey for local authorities to identify their specific challenges and offers a curated list of resources and critical discussion questions to facilitate stakeholder engagement and problem-solving. Findings from CASCADE workshops indicate that spatial planners in the Baltic Sea Region perceive financial resource shortages as a primary barrier, while emergency management practitioners highlight climate skepticism as a significant challenge.

The report details the results of the BONUS RETURN project, which identified and evaluated ecotechnologies for recovering nitrogen, phosphorus, and carbon from wastewater and agriculture in the Baltic Sea Region. While agricultural waste recovery often showed positive net present value, wastewater technologies typically required expensive infrastructure, leading to negative net present values. The project emphasizes that transitioning to a circular nutrient economy requires shifting away from linear 'silo' thinking, harmonizing EU regulations for phosphorus, and adjusting fertilizer pricing to account for environmental externalities.

The 'Mission Blue' workshop, organized by the BONUS RETURN project, engaged 49 stakeholders from seven countries to develop five prototype interventions to combat eutrophication in the Baltic Sea. Using a three-step 'Cook, Incubation, and Evaluation' methodology, participants combined 21 pre-defined measures across coordination, data, ecotechnologies, and policy categories. The resulting interventions focused on nutrient circularity, ranging from improving knowledge transfer between farmers and authorities to integrating sea-based mussel farming with land-based nutrient management. The report discusses the challenges of operationalizing mission-oriented policies, emphasizing the need to move beyond 'silo' organizational structures, align local capacities with strategic visions, and utilize public procurement to drive circular business models.

The study assesses the integration of climate adaptation into energy efficiency projects in the Baltic Sea Region, finding that mitigation and adaptation are largely treated as separate policy areas. While new buildings more frequently implement adaptation measures above minimum standards, retrofitted buildings primarily focus on mitigation. The report identifies key synergies, such as green roofs and automated indoor climates, but notes that their implementation is often ad hoc rather than planned. Significant barriers include a lack of legal requirements, funding gaps, and limited awareness among developers.

The document commemorates Arthur H. Westing, highlighting his role at PRIO and his contributions to the field of environmental security. It discusses his publications on the environmental hazards of war and security in the Baltic region, as well as his rigorous approach to academic accuracy and citations. The author notes Westing's perspectives on global overpopulation, transboundary pollution, and the relationship between economic globalization and environmental security.

The BONUS RETURN decision-support toolbox offers 16 tools to help decision-makers transition to a circular economy by adopting eco-technologies for nutrient and carbon recovery. It covers the entire innovation lifecycle, from identifying criteria through social innovation and multi-criteria analysis to promoting existing technologies via sustainable and circular public procurement. The guide also details methods for supporting pre-commercial innovation, such as innovation competitions, market surveys, independent comparative analyses, and testbed trials. It concludes by framing these tools within a Technological Innovation Systems (TIS) approach to create long-term strategic incentives and co-benefits for the Baltic Sea Region.

The BONUS RETURN project has released three baseline SWAT (Soil and Water Assessment Tool) model applications for the Vantaanjoki (Finland), Fyrisån (Sweden), and Słupia (Poland) river basins. These models, which have undergone calibration and validation, are hosted in the Finnish Environment Institute (SYKE) open data repository to allow researchers and practitioners to utilize existing parameterizations or develop new scenarios for these and similar target areas.

The document details the creation of MONITOR ECOTECH, a digital 'alpha' version of a serious game system (SGS) developed by Uppsala University as part of the BONUS RETURN project. The system aims to provide a participatory learning space for stakeholders to test the feasibility and vulnerability of various eco-technologies used to reduce nutrient and pollution emissions in the Baltic Sea Region. Built using the Unity 3D engine, the game uses socio-ecological data from environmental modelling and stakeholder consultations to simulate the impact of different technology combinations on nutrient flows. It differs from its board game predecessor, SELECT ECOTECH, by offering higher data granularity, real-time tracking of emissions, and the ability to simulate longer timeframes and more complex scenarios, specifically targeting 'wicked' problems where traditional environmental monitoring and assessment are insufficient.

The document summarizes a study on the circular phosphorus economy in the Baltic Sea Region, highlighting that a lack of policy steering and insufficient knowledge of technology performance are primary obstacles. While new EU Fertiliser Regulations offer opportunities to equalize waste-derived and conventional fertilisers, the report warns of potential technological lock-ins due to a narrow focus on a few recovery technologies.

The document details the development of SELECT ECOTECH, a serious game system (SGS) designed as a learning platform for stakeholders in the Baltic Sea Region (BSR). The game aims to foster systemic awareness and adaptive capacity when selecting eco-technologies to reduce nutrient and carbon emissions while maximizing co-benefits. Co-designed with stakeholders from three case study catchments—Fyrisån (Sweden), Vantaanjoki (Finland), and Slupia (Poland)—the game uses a board game format to simulate 'wicked' situations, including system shocks and policy changes. The report outlines a three-phase participatory design process, the game's rules regarding baseline emissions and resource management, and the specific eco-technologies and developments integrated into the system. The findings suggest that the iterative, playful nature of the SGS allows stakeholders to cross knowledge boundaries and experiment with innovative technology constellations beyond technocratic solutions.

The Słupsk Bioenergy Cluster, managed by Słupsk Waterworks, integrates wastewater treatment, biogas generation, and waste recycling to provide stable, low-cost renewable energy to local businesses and facilities. By utilizing a self-sufficient distribution network to bypass coal-based energy suppliers, the cluster demonstrates a decentralized approach to the circular economy. Key outputs include the BIOTOP phosphorus-rich fertilizer and a renewable energy sharing system linking 20 businesses and city facilities. The document argues that national policy changes and faster implementation of EU directives are necessary to scale such models and overcome barriers posed by traditional energy companies.

The research identifies the most common ecotechnologies used for nutrient and carbon recovery in agriculture, highlighting soil amendments, anaerobic digestion, and (vermi)composting as the most prevalent methods, with manure serving as the primary waste source.

The report details a policy dialogue workshop in Tallinn, Estonia, aimed at designing pathways toward a sustainable bioeconomy in the Baltic Sea region. Participants identified energy as the primary driving sector and emphasized the need for high-value-added products, localized value chains, and a shift in consumer thinking. Five key enabling factors were identified: clear policy goals (including carbon taxes and national strategies), support for research and innovation through multi-helix interaction models, public procurement and education to drive demand, cross-sector cooperation to manage biomass competition, and the integration of circularity to preserve biodiversity. The document also reflects on the pilot methodology, noting that the pre-selected global sustainability scenario was too general and that future workshops should group participants by economic sector rather than organization type.

The report evaluates the economic viability of various eco-technologies in the Fyrisån (Sweden), Słupia (Poland), and Vantaanjoki (Finland) river basins using a combined Cost-Benefit Analysis (CBA) and Multi-Criteria Analysis (MCA) approach. It finds that most technologies currently yield a negative net present value (NPV) due to high investment costs, with the notable exceptions of anaerobic digestion and thermal treatment in the Vantaanjoki basin.

The report evaluates two ecotechnologies for nutrient recovery from anaerobic digestate: struvite precipitation and ammonia stripping. Findings indicate that struvite precipitation is highly effective, particularly around pH 9.5 and with a magnesium-to-limiting-reactant ratio up to 4:1. Struvite is found to be a suitable phosphorus fertiliser for various crops, often yielding results comparable to mineral fertilisers. Ammonia stripping is also identified as effective, though the evidence base is too heterogeneous for quantitative synthesis. The review highlights a need for more field-scale and long-term validation of these technologies, especially within the Baltic Sea Region.

The report examines climate adaptation frameworks in the Baltic Sea Region (BSR), finding that while all nine studied countries have national strategies, only Denmark mandates local-level adaptation plans. Most BSR countries encourage but do not require municipalities to develop specific adaptation strategies, often relying on project-based funding or integrating climate risks into broader spatial and emergency planning. The analysis highlights a strong focus on flood risk management and identifies critical knowledge gaps regarding the comprehensiveness of local risk assessments and the sufficiency of stable funding and guidance for local authorities.

The report identifies 175 policy recommendations across 18 categories, finding that governance (31%) is the most frequent focus, followed by financing and methods/tools. While the European Commission and HELCOM focus heavily on governance and monitoring, BONUS projects contribute more to financing and innovative policy design. The study notes a significant lack of recommendations addressing global issues like climate change and biodiversity, despite their presence in the documents' background sections.