基于2011—2023年我国266个地级市的面板数据，实证考察公众环境关注对城市绿色全要素生产率的影响及作用机制。研究发现，公众环境关注可显著促进城市绿色全要素生产率提升，关注度每增加1个单位，城市绿色全要素生产率平均提高0.082个单位。这一结论经过替换被解释变量、替换核心解释变量等稳健性检验后依然成立。机制检验表明，公众环境关注通过强化地方政府环境规制强度、增加地方环保支出、促进地区绿色创新提高城市绿色全要素生产率，且公众环境关注在作用机制传导中存在阈值，只有当公众环境关注超过具体阈值时才能充分发挥机制变量对于城市绿色全要素生产率的促进作用。中介效应分析发现，作用机制存在链式传导效应。此外，公众环境关注对城市绿色全要素生产率的促进作用在区域和城市特征层面存在显著异质性。进一步分析发现，公众环境关注对于城市绿色全要素生产率的影响存在长期效应和正“U”型的非线性关系，且空间效应本地主导，外溢有限。研究结果对于促进城市绿色可持续发展具有借鉴意义。

Based on the panel data of 266 prefecture-level cities in China from 2011 to 2023， this study empirically examines the impact of public environmental concern on urban Green Total Factor Productivity （GTFP） and its mechanism of action. The findings indicate that public environmental concern significantly promotes the improvement of urban GTFP： for each 1-unit increase in attention， GTFP increases by an average of 0.082 units. This conclusion remains valid after robustness tests such as replacing the explained variable and the core explanatory variable. Mechanism tests show that public environmental concern can improve urban GTFP by strengthening the intensity of local government environmental regulation， increasing local environmental protection expenditure， and promoting regional green innovation. Furthermore， there is a threshold in the transmission of the mechanism of action of public environmental concern—only when public environmental concern exceeds a specific threshold can the mechanism variables give full play to their role in promoting urban GTFP. Mediation effect analysis reveals that the mechanism of action has a chain transmission effect. In addition， the promoting effect of public environmental concern on urban GTFP exhibits significant heterogeneity at the regional and urban characteristic levels. Further analysis shows that the impact of public environmental concern on urban GTFP has long-term benefits and a positive U-shaped nonlinear relationship， with limited spatial effects. The research results provide a reference for promoting urban green and sustainable development.