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As a new form of industrial organization, there is still a lack of research on how industrial symbiotic agglomeration affects green economic growth. To fill this research gap, this paper analyzes the impact mechanism of industrial symbiotic agglomeration on green economic growth from the perspective of energy efficiency, waste recycling, and green technology innovation. Based on the data of Chinese cities from 2004 to 2019, we use the spatial difference-in-differences approach for empirical testing. The research concludes: (1) Industrial symbiotic agglomeration can both significantly promote green economic growth and have a spillover effect on neighboring cities. (2) The specific spillover effects are divided into three cases. Diffusion effect (within 150 km), siphon effect (150 km–750 km), no significant spatial effect (over 750 km). (3) The promotion and spillover effects of industrial symbiotic agglomeration on green economic growth can only be brought into full play when a certain threshold is reached. The local promotion effect requires the area of the symbiotic agglomeration area to be greater than 106 km2, while the spillover effect requires a larger scale (greater than 393.2 km2) for it to manifest itself. This has theoretical and practical significance for promoting green growth and achieving sustainable development through symbiotic agglomeration. • For the first time, we analyze the impact mechanism of industrial symbiotic agglomeration on green economic growth from the perspectives of energy efficiency, waste recycling and green technology innovation. • For the first time, the impact of industrial symbiotic agglomeration on green economic growth is quantitatively analyzed. Industrial symbiotic agglomeration can both significantly promote green economic growth and have a spillover effect on neighboring cities. • The specific spillover effects are divided into three cases. Diffusion effect (within 150 km), siphon effect (150 km-750 km), no significant spatial effect (over 750 km). [ABSTRACT FROM AUTHOR]

Environmental policies are a significant driver of change towards the achievement of sustainability. Policies impact on the environment through direct and indirect effects. Indirect effects pertain to the effect of innovation and invention mechanisms. The paper analyses those direct and indirect effects by focusing on different measures of environmental productivity. Econometric analysis on a long macroeconomic panel dataset is used to convey original insights, and as a platform for policy assessments. Results show that environmental policies adopted by countries may boost environmental productivity performances both directly and indirectly, through innovation, across various environmental dimensions. The increasing stringency of environmental policy, which has been observed over the last decades, is a crucial driver of change for climate actions, waste and resource efficiency, touching upon various SDGs related to responsible consumption and production, economic growth, industry and innovation infrastructures and climate action. [ABSTRACT FROM AUTHOR]

Providing more affordable and cleaner energy for all raises complex and significant financial, political, technical, and institutional issues, which must all be addressed to ensure sustainable development. Energy technology innovation has a critical role to play as one of the best pathways to achieve the transition to a global clean energy system. This paper is an endeavor to study the impact of government energy technology research, development, and demonstration (RD&D) budget, which is the primary input of energy technology innovations on cleaner energy supply and carbon footprints (CFP). In this study, a cleaner energy supply is measured as the contribution of renewable energy to total primary energy supply (RE). We assumed that the effect of energy innovation is not uniform but varies according to the descending and ascending movements in a government's energy technology RD&D budget. To this end, we distinguished the impact of the descending and ascending movements in government energy technology RD&D budgets on cleaner energy supply, and CFP in Europe over the period 1985 to 2016. Additionally, we carried out a comparative examination of the effects of energy technology RD&D expenditures on RE and CFP under both linear and nonlinear panel techniques. To increase room for policy implications, we also controlled for the role of economic growth and trade openness and performed several robustness check analyses. We found that the reduction of carbon footprints associated with an increase in public support to energy technology RD&D is more pronounced than the contribution of energy technology innovation to the deployment of renewable energy in Europe. This study provided little evidence in favor of the effectiveness of a government energy technology RD&D budget to substantially boost renewable energy in Europe. Following these results, we suggest that the knowledge of the asymmetric linkage between public energy technology innovation, RE, and CFP is a starting point to achieve win-win solutions that favor clean energy and environmental sustainability. • Optimizing the nonlinear effects of energy technology RD&D budgets over different time horizons. • Asymmetries in the responses of RE and CFP to shocks in energy technology innovation budgets. • The influences of energy technology innovation vary over different time horizons. • The public budget devoted to energy innovation is fundamental for curbing CFP rather than boosting RE. [ABSTRACT FROM AUTHOR]