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Marine and Freshwater Research Marine and Freshwater Research Society
Advances in the aquatic sciences
RESEARCH ARTICLE

Effect assessment and policy optimisation of synergy between pollution and carbon reduction in the Yangtze River Delta, based on composite-system co-ordinating-degree model

Ersheng Fu https://orcid.org/0009-0000-9195-4077 A , Yiting Chen B , Yaguai Yu A C * , Ruiyan Gao A , Lu Fang A , Taohan Ni D , Zhaocheng Xu E and Yiyang Lin https://orcid.org/0009-0004-5178-4690 A
+ Author Affiliations
- Author Affiliations

A Business School, Ningbo University, Ningbo, 315211, PR China. Email: gaoruiyan0706@126.com; linyiyang0723@163.com; 3284123344@qq.com; 2791769419@qq.com

B Yangming School, Ningbo University, Ningbo, 315211, PR China. Email: 1322173961@qq.com

C Donghai Academy, Ningbo University, Ningbo, 315211, PR China.

D The University of Nottingham Ningbo China, Ningbo, 315119, PR China. Email: alexnee2004@126.com

E The University of Hong Kong, Hong Kong, Hong Kong SAR, 999077, PR China. Email: noahxzc@connect.hku.hk

* Correspondence to: yuyaguai@nbu.edu.cn

Handling Editor: Yong Xiao

Marine and Freshwater Research 75, MF24159 https://doi.org/10.1071/MF24159
Submitted: 23 July 2024  Accepted: 12 November 2024  Published: 19 December 2024

© 2024 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Context

The growth of contemporary industry has led to significant problems with carbon emissions. The Chinese government has set particular emission reduction goals and places a high priority on this issue.

Aims

Synergy effect of Chinese policies for reducing pollution and carbon emissions are analysed from two subsystems including pollution reduction and carbon reduction, by using the four provinces and cities of the Yangtze River Delta as the research objects.

Methods

Composite-system co-ordinating-degree model was used to evaluate order degree, internal co-ordinating degree and composite-system co-ordinating degree, with provincial panel data from 2011 to 2020 of four provinces and cities in the Yangtze River Delta being analysed as well.

Key results

First, the order degree of pollution-reduction and carbon-reduction subsystems in the Yangtze River Delta showed a slow-rising trend; second, the level of internal synergy degree of two subsystems was not readily apparent; and last, but not least, co-ordinating degree of composite system of pollution-reduction and carbon-reduction subsystems were at a low level.

Conclusions

Overall based on the above research conclusions, we propose several efficiency-enhancing policies, including optimisation of regional target co-ordination, further improvement of regional management-system design, establishment of regional resource-sharing mechanism and technological innovation system.

Implications

The efficiency-enhancing policies mentioned above contribute to advancing the construction of the national 无废城市 [‘Waste-Free City’] initiative and promoting the realisation of the national 双碳 [‘carbon peaking and carbon neutrality’] goals.

Keywords: carbon neutrality, coordinating degree of composite system, environmrntal efficiency, internal synergy degree, order degree, policy optimisation, synergy between pollution and carbon reduction, The Yangtze River Delta.

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