TemaNord 2025:520

YGGDRASIL The Living Nordic City

Implementing nature-based solutions
through the 3+30+300 principle

YGGDRASIL – THE LIVING NORDIC CITY

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Foreword Summaries 1. Introduction Introduction to Yggdrasil – The Living Nordic City Goals and objectives Challenges Participating cities Approach and methodology 2. The 3+30+300 principle – from concept to Nordic implementation Introduction of the ‘t(h)rees principle’ Use of the 3+30+300 principle to date Urban Forest Strategies and Master Plans – creating a strategy to reach the 3+30+300 principle Focus on the quality of green spaces and trees Opportunities and challenges with implementing 3+30+300 3+30+300 implementation in a Nordic setting – policies, practices, and opportunities Making the health connection Tree species diversity and 3+30+300 implementation 3. GIS-analysis of 3+30+300 status in Nordic cities Methodology Nordic Cities current adherence to the 3+30+300 principle Gap analysis to pinpoint areas with less than 30% canopy cover Socioeconomic perspectives on urban trees Nordic dimensions of socioeconomic vulnerability and access to green space and trees Comparison of tree cover data with climate-related parameters Trees under future climate change scenarios – an analysis 4. Mapping of tree species diversity in Nordic cities Species diversity in Nordic cities Tree species distribution in the partnering cities Distribution of tree species planted in Sweden in 2023 Exploration of impacts on climate adaptation, including biodiversity 5. Conclusions and recommendations Overall project results Recommendations Key messages Executive summary Sammanfattning på svenska Sammendrag på norsk Yhteenveto suomeksi Samantekt á íslensku References Appendix

Nordic Council of Ministers I www.norden.org/publications I pub@norden.org