for - definition - city - definition degree of urbanization - UN Statistical Commission report 2020 - from - there are 10,000 cities on planet Earth - https://hyp.is/91Rx7LgAEfCT6ytaqg9C9Q/nextcity.org/urbanist-news/there-are-10000-cities-on-planet-earth-half-didnt-exist-40-years-ago

summary - This 2020 report was commissioned by the UN Statisticial Commission to develop a robust, standardized definition of cities, towns and rural communities (villages) to aid in international comparison of human settlements