摘要
The rapid pace of global urbanization is profoundly reshaping our planet and will have significant implicatins for global sustainable development.According to the United Nations,urbanization is projected to surge from 56%in 2020to 67%by 2050,an 11%increase.'The expanding urban population has led to the con-version of an increasing amount of natural land into urban areas.It is anticipated that by 2030,urban areas across the globe will cover approximately 587 million km2,which is double the rate of population growth.2 In general,the availability of flat land resources suitable for both production and habitation is limited,and the relentless pace of urbanization consistently encroaches upon these resources.Consequently,adopting the"slope climbing"model for urban expansion has been prevalent in numerous regions and nations as a strategy to address the conflict between urban expansion and the scarcity of flat land resources.
基金
National Key R&D Program of China(grant 2019YFE0126800)
National Natural Science Foundation of China(grant 42101326)
Natural Science Research Program of Anhui Universities(grant 2023AH020029).
