29 October 2021, Rome Italy - Roberto Gualtieri, Mayor of Roma Capitale. G20 Green Garden tree planting ceremony, (Caffarella Park, Ancient Appian Way). Holm oaks trees, donated by the Regione Lazio as part of the OSSIGENO (OXYGEN) project, are being planted in the Appia Antica Park's Sacred Wood. This gesture, on the occasion of the Italian Presidency of the G20, symbolizes the commitment of G20 members to build a sustainable future for People, Planet, Prosperity.