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Insights into PM2.5 pollution of four small and medium-sized cities in Chinese representative regions: Chemical compositions, sources and health risks

Science of the Total Environment
Tong Ma, Jianhua Chen, Xing Peng
exaly  

Urban Shrinkage in Medium-Sized Cities: Trajectories and Influencing Factors

Journal of the Urban Planning and Development Division, ASCE
exaly  
11. sustainability
1. no poverty
8. economic growth
small and medium-sized cities
smart cities
9. industry and infrastructure
humans
medium-sized city
12. responsible consumption
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