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Updated: Aug 26, 2025

Production and Measurement of Organic Particulate Matter in the Harvard Environmental Chamber

Production and Measurement of Organic Particulate Matter in the Harvard Environmental Chamber

Published on: November 18, 2018

Manufacturing agglomeration, urban form, and haze pollution.

Jishi Wei^1,2, Yunling Ye³, Haichao Yu^4,5

¹School of Urban and Environmental Sciences, Central China Normal University, Wuhan, 430072, China.

Environmental Science and Pollution Research International

|October 10, 2022

Summary

Manufacturing agglomeration initially increases then decreases haze pollution. Urban form complexity and fragmentation worsen pollution, while compactness mitigates it, revealing complex urban-environment interactions.

Keywords:

Haze pollution Manufacturing agglomeration Moderating effect Threshold effect Urban form

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Area of Science:

Environmental Science
Urban Studies
Economics

Background:

Manufacturing agglomeration drives economic growth but exacerbates environmental pollution.
Haze pollution is a significant environmental challenge in China, linked to industrial activities.

Purpose of the Study:

To investigate the impact of manufacturing agglomeration on haze pollution in Chinese cities.
To analyze the moderating and threshold effects of urban forms on this relationship.

Main Methods:

Econometric analysis of city-level data in China.
Examination of inverted U-shaped, moderating, and double threshold effects.

Main Results:

Manufacturing agglomeration shows an inverted U-shaped effect on haze pollution overall and in eastern/central regions.
Urban external shape complexity and fragmentation positively moderate the relationship.
Urban fragmentation has a negative moderating effect at high agglomeration levels.
Urban form exhibits double threshold effects, altering the impact of agglomeration.

Conclusions:

Manufacturing agglomeration's impact on haze pollution is complex and contingent on urban form.
Urban planning strategies considering urban shape and fragmentation are crucial for mitigating pollution.
Increasing urban compactness can enhance the pollution-inhibiting effects of manufacturing agglomeration.