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The Driving Influence of Multi-Dimensional Urbanization on PM2.5 Concentrations in Africa: New Evidence from
Guoen Wei1,2, Pingjun Sun3, Shengnan Jiang1,2
1College of Geography and Ocean Sciences, Nanjing University, Nanjing 210023, China.
International Journal of Environmental Research and Public Health
|September 10, 2021
Summary
Africa
Area of Science:
- Environmental Science
- Urban Studies
- Public Health
Background:
- Particulate Matter (PM2.5) pollution in Africa poses a security risk.
- Understanding urbanization's impact on PM2.5 is insufficient, especially spillover effects.
- Previous studies overlooked multi-dimensional urbanization's distinct influences on PM2.5.
Purpose of the Study:
- To analyze spatio-temporal changes and trends of PM2.5 and urbanization in Africa.
- To investigate the differential impacts and interactions of multi-dimensional urbanization on PM2.5.
- To provide evidence for cross-regional air pollution control strategies.
Main Methods:
- Combined grid and administrative unit data for analysis.
- Explored spatio-temporal patterns, spatial dependence, and trends of PM2.5 and urbanization.
- Analyzed differential influence and interaction effects of multi-dimensional urbanization.
Main Results:
- Positive spatial dependence of PM2.5 increased from 2000-2018.
- Areas exceeding 35 μg/m3 PM2.5 increased by 2.2%; 36.78% showed an increasing trend.
- Economic urbanization had a greater impact on PM2.5 than land or population urbanization; spillover effects were significant.
Conclusions:
- Urbanization is a key driver of PM2.5 changes in Africa.
- Interactions between different dimensions of urbanization non-linearly enhance PM2.5 concentrations.
- Integrated, cross-regional strategies are needed for effective PM2.5 pollution control.
Keywords:
African regionPM2.5 concentrationsmulti-dimensional urbanizationspatial regression modelspillover effectMore Related Videos
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