Research clearly shows that urban trees contribute to improved public health, climate resilience and quality of life. To put this knowledge into practice, Professor Cecil Konijnendijk has developed the 3+30+300 rule, a methodology with clear targets:

• 3 trees should be visible from each residential window

• 30% tree canopy cover in each residential area

• 300 m to the nearest park or green area

Working with 3+30+300 is a powerful way to strengthen the link between the city's green infrastructure and people's well-being, physically, mentally and socially.

During the training, we go through all the elements of the 3+30+300 principle and link them to practical actions, strategic decisions and communication tools. The course is aimed at those working in urban planning, green management, community building or sustainability issues.

We discuss the following issues, among others:

• How is 3+30+300 measured in practice?
• How can the model be used in communication with politicians and citizens?
• How are the principles integrated into the planning of new buildings and densification?

3 trees in the spotlight

• How to measure visual contact with trees?
• How can trees be established in difficult locations, such as in dense environments?
• Review of the Plantable Spots method - for increased survival of new plantings.

30 % Tree canopy cover

• Overview of different measurement methods - strengths and limitations
• Preservation of trees during construction and other interventions
• Scientific support for the 30% canopy cover target

300 m to the nearest green areas

• How can we assess the quality of the green space, not just its distance?
• Examples of how different municipalities and managers measure and ensure quality
• Application of the Free or Trap 3.0 tool in different environments