Yggdrasil

The Living Nordic city

Advancing Nature-Based Solutions in Nordic Cities

The project's main objectives were to evaluate how well Nordic cities aligned with the 3+30+300 principle in their urban greening efforts, identify opportunities to increase tree canopy cover, and analyze the accessibility of green spaces in relation to socio-economic factors. Additionally, the project aimed to develop models to support cities in implementing the 3+30+300 principle and to foster collaboration among Nordic cities and towns by sharing best practices and promoting cooperation.

A key strength of the project was the involvement of a diverse team with expertise in urban green space analysis and policy development. The project benefited from collaborations with municipalities, housing companies, consultancies, universities, and national government agencies across the Nordic region and beyond. By applying established methods for assessing and mapping urban greenery, the project generated reliable data and insights. It balanced academic research with practical application, incorporating perspectives on both native and non-native tree species.

Through this initiative, Nordic cities gained new insights into their green space distribution and the broader implications of the 3+30+300 principle. The final report and handbook now serve as key resources for cities seeking to enhance their urban greenery and integrate nature-based solutions into their planning and decision-making. The project laid the foundation for further collaboration and strategic development, supporting efforts to create more sustainable and resilient urban environments across the Nordic region.

The full report is available in English, Swedish, and Norwegian, with the executive summary also available in Icelandic and Finnish. The main findings show Finland and Norway lead in compliance with the 3+30+300 principle, while Iceland and Greenland face challenges. Recommendations focus on policy integration, native and diverse species for resilience, and equitable access to green spaces. The report highlights the principle's flexibility and its importance in fostering sustainable, liveable Nordic cities.

The Project group

• The Tree Office
• The tree office
• The Ecology Group
• Nature Based Solution Institute
• Cobra
• Lund University
• University of Copenhagen

The 3-30-300 principle

3 - Visible green
Everyone should be able to see at least three large trees from where they live, work, learn, or receive care. This promotes psychological well-being and connection to nature, and also enhances mental recovery, concentration, learning, and creativity.

30 - Living Area or Climate Green
Neighborhoods - defined based on local definitions and needs - should have at least 30% tree canopy cover. This provides environmental benefits, such as cooling and improved air quality, while also enhancing our wellbeing and physical health, and fostering more social interactions.

300 - Recreational green
We should all have a high-quality, publicly accessible green space of at least 0.5-1.0 hectares no more than 300 meters walk or bike ride away, ensuring accessibility for recreation and fostering healthier lifestyles.