Figure 3. Continent type of urban settlement trends (2020-2035). In the figure, A: means urban settlement of 10 million people or more; B: 5 to 10 million; C: 1 to 5 million;D: 500,000 to 1 million and D: 300,000 to 500,000 urban people (source: UN-HABITAT from UNDESA, 2020).To learn more about the content of the article, please click the link