At the World Forum on Urban Forests in October 2018, the FAO and the Arbor Day Foundation jointly launched the Tree Cities of the World programme. The aim of this programme is to celebrate and recognize cities and towns of all sizes throughout the world which have shown a commitment to maintaining their urban forests. From the end of 2019, any municipality which has responsibility for its trees were able to apply to join Tree Cities of the World. On 4 February 2020, 59 cities were announced as having achieved the designation of Tree City of the World. There were 27 in the United States, with the rest scattered across the world.