Where the 3-30-300 principle is met

Percentage of each city's population meeting all three criteria of the 3-30-300 principle.

3 trees visible   30% canopy cover   300m from a park   Search  

Chart: Based on El ConfidencialSource: Bertassello, L.E., Velde, M., Maes, J. et al. Assessing European cities with the 3-30-300 rule underscores the need for enhanced urban greening efforts. Nat Commun (2026)Get the dataCreated with Datawrapper