关键词: 科技创新, 空气污染, 绿色专利, 机制分析

Abstract: Based on the manually collected patent data of 288 cities and their industries in China from 2005 to 2015，this paper empirically analyzes the impact，heterogeneity and mechanism of urban technological innovation on air pollution This study finds that urban technological innovation significantly curbs air pollution and has a spatial effect In terms of different industries，while technological innovation in manufacturing and energy industries can curb air pollution，technological innovation in agriculture，forestry，animal husbandry and fishery，information services，and mining industries can exacerbate air pollution Heterogeneity analysis finds that green patents can be more effective in reducing air pollution；technological innovation in inland cities （especially those in western regions） and cities with a population of less than 5 million can effectively reduce air pollution Mechanism analysis finds that technological innovation has restrained air quality from further deteriorating through industrial structure upgrading，energy consumption reduction and economic growth，but the role of technological innovation in alleviating resource mismatch should be further strengthened to curb air pollution

Key words: technological innovation, air pollution, green patent, mechanism analysis