Low-carbon transition effects of the digital economy in Chinese cities — the perspectives of green technology innovation and energy efficiency – Humanities and Social Sciences Communications

How does the rapid rise of the digital economy reshape urban carbon emissions in China? Examining city-level trends from 2010 to 2023, new analysis points to a striking pattern: digitalization initially pushes emissions up, but beyond a critical threshold it catalyzes a low-carbon shift. Two forces explain this turning point—green technology innovation and improvements in energy efficiency—while the strength of the effect varies greatly across regions, regulatory environments, and the size of the digital divide.

The arc of digitalization: from higher emissions to real reductions

Digital systems—data centers, networks, connected devices—require substantial energy and material inputs during their build-out. In the early phase, this infrastructure expansion and the surge in digital activity often lift energy demand and, with it, emissions. Over time, however, the same technologies enable sweeping efficiencies: smarter logistics, predictive maintenance, precision energy management, and faster diffusion of low-carbon solutions. The result is an inverted U-shaped relationship between the digital economy and city-level carbon emissions: an initial rise followed by a decline once digital maturity reaches an inflection point. This pattern holds under extensive robustness checks, including alternative model specifications and strategies that address potential endogeneity.

The innovation channel: how digitalization accelerates green breakthroughs

Digital tools supercharge the creation and spread of cleaner technologies. High-resolution data, cloud computing, and AI shorten R&D cycles, guide better design choices, and reveal where emissions cuts are most cost-effective. Digital platforms reduce transaction and coordination costs for collaborative research, help firms locate green suppliers, and speed up commercialization. Fintech and digital finance widen access to capital for clean startups and retrofits. These dynamics raise the volume and quality of green patents, increase the uptake of low-carbon equipment, and expand markets for climate-aligned services—together forming a powerful pathway from digital growth to emissions reduction.

The efficiency channel: sensors, software, and smarter systems

Widespread connectivity and analytics translate directly into energy savings. Real-time sensors and IoT networks allow factories to fine-tune processes, buildings to optimize heating and cooling, and fleets to reduce idling and empty miles. AI controls can flatten demand peaks, integrate distributed renewables, and automate demand response. Supply chains become leaner as digital twins and predictive tools cut waste and shorten lead times. At city scale, smarter traffic systems ease congestion; at grid scale, advanced forecasting improves renewable integration. These gains accumulate, pushing energy intensity down and reinforcing the low-carbon transition.

Where the gains are strongest

• Regional differences: Eastern cities—typically with deeper digital infrastructure, denser innovation ecosystems, and more service-oriented economies—cross the inflection point sooner and deliver stronger carbon reductions. Western cities often sit earlier on the curve, where digital expansion still raises emissions.
• Regulatory context: Digitalization pairs especially well with rigorous environmental oversight. Clear standards, monitoring, and incentives help convert digital capability into concrete abatement, from cleaner industrial processes to stricter building performance.
• The digital divide: Where connectivity, affordability, and digital skills lag, the payoff from digital technologies is muted. Bridging these gaps is essential for the low-carbon benefits to materialize.

Policy priorities to accelerate the low-carbon payoff

• Rebalance digital investment: Tilt public support toward western cities, jurisdictions with weaker environmental supervision, and areas facing pronounced digital divides. Priorities include broadband access, affordable devices, and training for small and medium-sized enterprises and municipal agencies.
• Green the digital backbone: Encourage renewable-powered data centers, advanced cooling and heat recovery, efficient chips and servers, and carbon-aware software practices to blunt the early-stage emissions surge.
• Supercharge green innovation: Expand targeted R&D funding, digital sandboxes for clean-tech pilots, data-sharing frameworks, and open standards that reduce market entry barriers. Align procurement and tax incentives with measurable green outcomes.
• Unlock energy efficiency at scale: Set performance-based standards for smart equipment and buildings, support digital retrofits across industry and public facilities, and modernize electricity markets to reward demand response and flexibility.
• Strengthen governance and measurement: Deploy digital MRV (monitoring, reporting, and verification) systems for emissions, energy use, and green innovation outputs. Guard against rebound effects with sound carbon pricing and complementary efficiency policies.
• Align regulation with digital capability: Use environmental rules to steer digital tools toward compliance and continuous improvement, ensuring that data-driven oversight translates into durable emissions reductions.

Methods in brief

The findings draw on a panel of Chinese cities from 2010 to 2023, combining indicators of digital economy development with city-level carbon emissions and controls for economic structure and policy context. The analysis tests for non-linear impacts and examines mediating roles for green technology innovation and energy efficiency. To ensure credibility, it employs multiple robustness checks, including alternative model forms and instrumental-variable approaches. Across specifications, the inverted U-shape remains significant, and both innovation and efficiency consistently mediate the pathway from digitalization to lower emissions.

What this means for cities

Digitalization is not automatically green—but it can become a powerful climate ally once cities cross the maturity threshold and pair technology with the right policies. The early-stage risks are manageable with deliberate choices that decarbonize the digital backbone and curb rebound effects. The bigger prize lies in harnessing digital tools to accelerate green innovation and drive systemic efficiency gains. With targeted support to places at risk of being left behind, the digital economy can help Chinese cities cut carbon faster, cleaner, and more fairly.