Urban green spaces: 13.5% of Europeans live in areas complying with the 3-30-300 rule

Only 13.5% of the inhabitants of 862 European cities studied live in areas that simultaneously meet the three criteria of the so-called '3-30-300 rule', the benchmark for urban greening, according to a study by the European Commission's Joint Research Centre, with the University of Copenhagen, published in Nature Communications on 09/04/2026...