Amidst climate change and the energy crisis worldwide, the synergy between smart city and environmental policies has become a key path to improving the green resilience of cities. This study examines the spatial effects of carbon emission trading (CET) policy on urban energy performance under the context of artificial intelligence (AI)-empowered smart cities. Using the spatial Durbin model (SDM) and analyzing data from 262 Chinese cities covering the period 2013–2021, the results reveal that: (1) smart cities significantly benefit from the institutional support of the local CET policy, resulting in an 8.55% reduction in energy consumption in the pilot city; (2) AI advancement contributes directly to reducing energy consumption in surrounding areas by 21.84% through spatial effects, and compensates for the imbalance of regional renewable energy caused by the “siphon effect” of CET policy. This study provides empirical evidence for developing countries to build green and resilient cities. This paper proposes the need to build a national CET market, strengthen government supervision, and make reasonable use of AI technology, transforming the green and resilient model of smart cities from Chinese experience to global practice.

This paper examines the impact of renewable energy heating on air quality in China, using the Qinling Mountains–Huaihe River line as a quasi-natural experiment to distinguish between regions with central heating and those without. Employing a difference-in-differences approach and analyzing panel data from 298 cities between 2014 and 2022, our findings indicate that the renewable energy heating policy has significantly improved air quality. Specifically, the policy led to substantial improvements in air quality, reducing concentrations of key pollutants: SO₂ by 28.31%, CO by 7.57%, NO₂ by 5.72%, and PM2.5 by 7.15%. The policy’s effects are most pronounced in regions with lower temperatures and in the eastern parts of the country. Further analysis emphasizes the critical role of energy transition, environmental regulations, and government investment in technology as key drivers of these air quality improvements.

This paper examines the impact of renewable energy heating on air quality in northern China, using the Qinling Mountains-Huaihe River line as a quasi-natural experiment to distinguish between regions with central heating and those without. Employing a difference-in-differences approach and analyzing panel data from 299 cities between 2014 and 2022, our findings indicate that the renewable energy heating policy has significantly improved air quality. Specifically, the policy led to substantial reductions in the Air Quality Index (AQI) and concentrations of key pollutants: SO2 by 28.31%, CO by 7.57%, NO2 by 5.72%, and PM2.5 by 7.15%. The policy's effects are most pronounced in regions with lower temperatures and in the eastern parts of the country. Further analysis emphasizes the critical role of energy transition, environmental regulations, and government investment in technology as key drivers of these air quality improvements.

As trade in services continues to play an increasingly important role in international trade, effectively integrating its advancement with green development has become a key issue for China in shaping a new development paradigm. This study treats the service trade pilot city policy as a quasi-natural experiment, employing the Difference-in-Differences (DID) method to investigate the policy’s impact on urban green energy use. The findings indicate that the policy significantly boosted green energy consumption in pilot cities. Heterogeneity analysis reveals more pronounced policy effects in eastern regions and provinces with smaller populations. Furthermore, synergistic effects emerge when this policy interacts with artificial intelligence (AI) technology policies and urban environmental policies, further amplifying green energy consumption outcomes. Consequently, this study proposes recommendations including strengthening institutional innovation in green services trade within pilot zones, establishing cross-regional green collaboration networks, and promoting multi-policy coordination. These findings offer valuable insights for developing countries seeking to achieve sustainable development through services trade liberalization.