Compliance with the 3-30-300 principle by country

Percentage of urban population* living in areas that meet the 3-30-300 principle in Europe.

* Only countries with at least three cities analysed are shown.
Chart: 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