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While new infrastructure, as a technological extension of traditional infrastructure, has important digital economy attributes, mismatched investment in new infrastructure can still be environmentally damaging. To this end, this paper explores the potential impact of the matching relationship between the new infrastructure investment (NII) and the upgrading of industrial structure (UIS) on environmental pollution from the perspective of coupling and coordination between the two. Through a series of quantitative empirical and robustness tests on China's relevant data from 2011 to 2019, this paper concludes that the coupling coordination level (NUC) of NII and UIS has an inhibitory effect on major environmental pollutants; in terms of mediating effect, NUC can reduce the emission of major environmental pollutants by improving energy consumption structure (ECS) and green innovation level (GII); in terms of nonlinear change characteristics, there is a threshold effect of NUC on the emission of industrial sewage and industrial dust; in terms of spatial properties, NII, NUC, PM2.5 and industrial sewage have positive spatial spillover effects. This study provides theoretical and empirical evidence that can support the government's decision to implement differentiated new infrastructure investment decisions based on environmental protection, and it also provides a certain level of reference for developing countries to make more environmentally friendly new infrastructure investment decisions. [ABSTRACT FROM AUTHOR]

The coupling coordination of digital economy and green high-quality development of industries is an important way for sustainable and high-quality economic development. This paper constructs an evaluation index system for the digital economy and industrial green high-quality development, and conducts empirical analysis using the coupling coordination model, the spatial autocorrelation model, and the Tobit model. The data from provinces and cities in the Yangtze River Economic Belt spanning from 2008 to 2021 has been analyzed. Results show that both subsystems exhibit a good and rising coupling coordination, and the regional coupling coordination demonstrates a trend of higher values in the east and lower in the west. Moreover, there is interaction between provinces and cities, albeit with a weakening correlation after 2011. Additionally, spatial clustering is evident between regions with high and low coupling coordination. The coupling coordination degree of each region is impacted by important factors, such as economic development level, financial level, opening up, fiscal expenditure, and urbanization. Therefore, the study recommends policies aimed at boosting the coupling coordination level in the Yangtze River Economic Belt. Key policy proposals contain promoting the integration and innovation of digital technology and green low-carbon technology, strengthening regional cooperation through the transfer of industries, and adopting differentiated development strategies tailored to regional advantages and the varied impact. [ABSTRACT FROM AUTHOR]

Scientific and technological innovation and the sustainable development of new urbanization are the key factors to promote national economic growth, and have a very important role in promoting regional development and international competitiveness. Based on the panel data of 16 cities in Chengdu-Chongqing dual-city economic circle from 2015 to 2022, this paper uses entropy weight method to determine the weight of each index and constructs a coupling coordination model to explore the sustainable development of scientific and technological innovation and new urbanization, the Panel Vector Autoregression (PVAR) model was used to further verify the interaction between the two. The empirical results show that the coupling coordination degree of scientific and technological innovation and new urbanization in Chengdu-Chongqing economic circle is increasing year by year. There is a balanced relationship between scientific and technological innovation and new urbanization, and the two are two-way Granger causality. Therefore, the conclusion puts forward the practical enlightenment of increasing investment in scientific and technological innovation, guiding enterprises to carry out scientific and technological innovation to feedback new urbanization and accelerate the construction of new urbanization, and actively integrating with urban development. [ABSTRACT FROM AUTHOR]

How to improve the sustainability of resource-exhausted cities has become a difficult problem for China to implement the sustainable development strategy, and the construction of resilient cities has become the best way to solve this problem. This paper constructed an evaluation indicator system of the sustainable development for resource-exhausted cities from the perspective of resilient cities. The entropy weight-TOPSIS-grey relational degree model was used to quantitatively analyze the sustainable development capacity of 23 resource-exhausted cities in China from 2010 to 2020. And the coupling coordination degree model was further used to analyze the relationship between urban resilience and the dimensions of economy, environment, society and resource respectively. The weak links affecting their sustainable development was explored through obstacle degree model. The research results are helpful to fully understand the current situation and obstacle factors of the sustainable development of resource-exhausted cities in China, and promote the sustainable development of cities through the construction of resilient cities. [ABSTRACT FROM AUTHOR]

Promoting industrial ecology and greening is the fundamental requirement of the new development concept, and also the key to realizing high-quality and sustainable development of regional economy. This paper selects the relevant data of eight cities in Anhui section of Huaihe River Economic Belt from 2014 to 2018, and uses the entropy method and the undesirable SBM model to calculate the industrial development level and ecological efficiency during the study period. Moreover, based on the coupling coordination degree model, the synergistic effect between industrial development and ecological efficiency is analyzed, and the spatial-temporal evolution pattern between them is clarified by means of spatial econometric analysis model. Further research suggests that: (1) the synergistic effect between industrial development and ecological efficiency in Anhui section of Huaihe River Economic Belt from 2014 to 2018 is significant, showing a steady strengthening trend. The endogenous power of industrial development keeps strengthening, and the scale effect keeps spillover diffusion. The mean value of overall coupling coordination degree is generally between 0.6 and 0.7. (2) In terms of spatial distribution, the regions with high coupling coordination degree are mainly distributed in the eastern part of Anhui Section (Bengbu and Chuzhou), the lower level area is mainly distributed in the northern part of Anhui Section (Suzhou), and the middle level area is widely distributed. (3) The agglomeration of coupling coordination degree between industrial development and ecological efficiency mainly occurs in low-high (L-H) and high-low (H-L) agglomeration areas. (4) The level of economic development, intensity of R&D and intensity of environmental regulation have significant positive effects on the coupling coordination degree of industrial ecological efficiency and industrial development, and promote the increase of coupling coordination effect. Finally, based on the research results, targeted suggestions are put forward in order to promote the coupling coordination between industrial development and ecological civilization construction, and walk out of a new road of high-quality development of green ecology. [ABSTRACT FROM AUTHOR]