Enhancing Carbon Storage through Green and Blue Infrastructure
Nordic cities are increasingly integrating green and blue infrastructure to enhance carbon storage, biodiversity, and climate resilience. Urban green spaces and forests, such as those in Stockholm's Hammarby Sjöstad, help sequester carbon and mitigate heat islands, while blue infrastructure, exemplified by Oslo's River Renewal Project, improves flood resilience and water quality. The use of bio-based building materials is also gaining traction, as seen in Denmark’s Biological House “Det Biologiske Hus”, which offers sustainable construction alternatives that contribute to carbon reduction. However, challenges like competing land use, maintenance needs, and regulatory barriers complicate implementation. Projects such as Heidelberg Cement’s carbon capture and storage initiative and AquaGreen’s biochar technology demonstrate the potential for industry-led innovations to drive sustainability. These technologies reduce CO2 emissions, produce renewable energy, and enable more resource-efficient urban development. Key enablers for scaling these solutions include supportive policies, green financing, and community engagement, alongside short-term interventions like climate budgeting, preferred procurement practices, and design competitions.