Urban Development in Yemen 13 indicators covering urban development for Yemen. IndicatorLatest Year10-yr change Rank Population in the largest city 22.8% 2025 down 7.8% 106th Population density 74.61 people per sq. km of land area 2023 up 34.4% 132nd PM2.5 air pollution, mean annual exposure 46.84 micrograms per cubic meter 2023 down 9.7% 15th Population in urban agglomerations of more than 1 million 3.53 million 2025 up 41.4% 62nd Population in urban agglomerations of more than 1 million, per capita 0.0844 units per person 2025 up 5.5% 112th Population in urban agglomerations of more than 1 million, annual 3.51 % change on previous year 2025 down 4.2% 19th Population in urban agglomerations of more than 1 million, per unit 0.0001 units per US$ of GDP 2018 up 78.5% 14th Population in urban agglomerations of more than 1 million, per square 6.24 units per square kilometre 2023 up 41.8% 97th Population in largest city 3.53 million 2025 up 41.4% 54th Crude steelmaking capacity 0.286 Tonnes 2025 unchanged 78th Africa's Development Dynamics (AfDD) Table 23 - Ecological 38.18 Hectares 2020 up 111.4% 100th PM2.5 air pollution, population exposed to levels exceeding WHO 100.0% 2017 unchanged 1st Dollar value of all resources made available to strengthen 936,012 2023 down 87.9% 92nd