首页|Global inequality in built-up land per capita and its change trajectories between 1985 and 2020
Global inequality in built-up land per capita and its change trajectories between 1985 and 2020
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Built-up land has increased rapidly in recent decades,thus aggravating the competition for land between multiple uses.The increase in urban land can be decomposed into changes in population and changes in built-up land per person.Yet,it is unclear how this decomposition differs by country and how this decomposition changes over time.Moreover,we don't know whether these changes affect the inequality in built-up land per capita.Here,we analyze the global distribution of built-up land per capita in the year 2020,as well as the changes therein between 1985 and 2020.We find that built-up land per capita in 2020 differs by an order of magnitude between countries,ranging from 15 m2 per person in Ethiopia to 734 m2 per person in Australia.Moreover,we find a wide range of different change trajectories,including both increases and decreases in built-up land per capita and in total population.As the total area of urban land increased in all countries,decreases in urban land consumption reflect a situation where the population increases faster than the total amount of urban land.We also find a large inequality in urban land consumption across countries,as indicated by a Gini index of 0.47 in 1985,decreasing only slightly to 0.45 in 2020.These findings suggest the need for a regionally differentiated approach to reduce urban land take,focusing first on mitigating further increases in those countries that already have a high urban land consumption.
Urban expansionHuman settlementsInequalityUrban densificationSDG 11Sustainable development
Jasper van Vliet、Hang Yang、Vita Bakker、Mengmeng Li
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Institute for Environmental studies,Vrije Universiteit Amsterdam,De Boelelaan 1111,1081 HV Amsterdam,the Netherlands
School of Environmental and Geographical Sciences,Shanghai Normal University,Shanghai 200234,China
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