The zero-waste city initiative, launched by the Chinese government in 2018, represents a systematic approach to minimizing waste generation and maximizing resource recovery across urban economies. Rather than treating waste as a disposal problem, the program encourages cities to redesign production, consumption, and governance so that materials circulate efficiently. The new study focuses on a critical question: does digitalization strengthen the environmental gains that zero-waste policies are intended to produce?

To answer it, the researchers assembled a panel of Chinese cities enrolled in the zero-waste city program and measured two dimensions of performance. The first captured the degree of digitalization, reflecting the penetration of digital infrastructure, platforms, and governance tools. The second measured the synergistic effects of pollution reduction and carbon emission reduction, a composite indicator of how effectively cities cut conventional air pollutants and greenhouse gases at the same time. The team then applied econometric methods, including fixed-effects regression and mediation analysis, to test whether digitalization directly improves environmental performance or operates indirectly through zero-waste governance.

The results point to a clear pattern. Cities with higher levels of digitalization recorded stronger synergistic effects of pollution and carbon reduction, and the relationship held after accounting for economic structure, population, and other confounding factors. The analysis suggests that digital technology operates through two channels. First, it directly improves environmental monitoring, enforcement, and resource allocation, allowing regulators to detect violations and optimize waste flows in real time. Second, it strengthens the governance capacity of zero-waste policies themselves, making it easier for cities to implement the systemic redesign that the program requires.

One of the most striking findings concerns the indirect pathway. When the researchers decomposed the total effect of digitalization, they found that a substantial share operates through zero-waste governance rather than through direct environmental improvements. In other words, digital technology does not simply cut pollution on its own; it makes zero-waste policies work better. This distinction matters for policymakers, because it implies that investments in digital infrastructure may yield the greatest environmental returns when they are paired with systemic waste governance reforms rather than deployed in isolation.

The study also highlights heterogeneity across cities. The positive relationship between digitalization and environmental performance was strongest in cities with more advanced industrial structures and higher levels of human capital, suggesting that digital technology delivers the greatest benefits where the underlying economy is prepared to absorb it. In cities with less developed industrial bases, the effect was weaker, indicating that digitalization alone cannot compensate for structural gaps in the economy.

Regional differences added another layer of nuance. The researchers found that the relationship was more pronounced in eastern China, where digital infrastructure is densest and zero-waste governance is most mature, than in central and western regions. This pattern suggests that the environmental returns to digitalization depend on the maturity of the governance system in which it is embedded. Where zero-waste policies are still taking shape, digital technology may deliver weaker gains until the underlying governance framework catches up.

The findings carry implications far beyond China. As countries around the world pursue net-zero commitments, many are investing heavily in digital infrastructure, from smart grids to AI-based monitoring systems. The new study suggests that the environmental value of these investments depends on how they interact with systemic governance reforms. Digital technology may amplify the benefits of well-designed environmental policies, but it cannot substitute for them. For policymakers, the message is that digitalization and environmental governance must advance together rather than in parallel silos.

The research also contributes to a growing literature on the so-called digital-environmental nexus. Earlier studies have examined how digitalization affects carbon emissions, air quality, and resource efficiency, often with mixed results. The new analysis adds a distinctive angle by focusing on the synergistic effects of pollution and carbon reduction, a composite measure that captures how effectively cities cut conventional pollutants and greenhouse gases simultaneously. This framing is particularly relevant for China, where air quality improvement and climate mitigation have historically been pursued through separate policy tracks.

Limitations remain. The study focuses on Chinese cities enrolled in the zero-waste city program, and the findings may not generalize to cities with different governance systems or economic structures. The measurement of digitalization and environmental performance also involves composite indicators that may not capture every dimension of these complex phenomena. Nevertheless, the research provides some of the clearest evidence to date that digital technology and zero-waste governance interact to shape environmental outcomes, offering a template for future studies in other contexts.

Subject of Research: How digitalization influences the synergistic effects of pollution reduction and carbon emission reduction in Chinese zero-waste cities.

Article Title: Spatial effects of digital technology on enabling the synergistic effects of pollution reduction and carbon emission reduction in “zero-waste city”

Article References: Meng, X., Cong, X., Wang, L., Šaparauskas, J., Dankiewicz, R., & Skibniewski, M. J. (2026). Spatial effects of digital technology on enabling the synergistic effects of pollution reduction and carbon emission reduction in “zero-waste city”. Clean Technologies and Environmental Policy, 28(11), Article 279. https://doi.org/10.1007/s10098-026-03570-0

Image Credits: AI Generated

DOI: 10.1007/s10098-026-03570-0

Keywords: digitalization, zero-waste city, pollution reduction, carbon emission reduction, synergistic effects, environmental governance, China, Clean Technologies and Environmental Policy, econometric analysis, mediation analysis, digital infrastructure, urban environmental policy