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The impact of air pollution is one of the hotspots attracting continuous scholarly attention, but the comprehensive statistical and visual analysis reviews are few. Employing the method of bibliometric analysis, this paper took the relevant literature from 1996 to April 2022 on the Web of Science as the research object. Through the methods of keyword co-occurrence analysis and burst analysis, the spatiotemporal evolution trend, cooperation network, outstanding scholars, knowledge base, and research focus of air pollution impact research are visually presented. Via constructing a common word matrix of high-frequency words, clustering analysis is used to aggregate high-frequency keywords into 24 clusters. By the strategic coordinate analysis method, the relationships within and between clusters were revealed. The main findings include (1) research on the impact of air pollution mainly focusing on human health; (2) the six keywords with the highest centrality are California, hydrocarbons, dioxide, generation, Asia, and diesel; (3) these 11 clusters may be developed into future research hotspots: particulate matter, nitrogen oxides, mortality, ozone, pollution, air quality, asthma, children, epidemiology, aerosols, and polycyclic aromatic hydrocarbons; and (4) seven topics are research hot: daily mortality, long-term exposure, coronary heart disease, concentration, North China plain, traffic-related air pollution, and air pollution. [ABSTRACT FROM AUTHOR]

• A novel spatial general equilibrium model was constructed and the impact of air pollution on urban residents' welfare in China was studied. • Empirical study shows air pollution significantly reduces urban residents' welfare and migration cost reduces the negative impact of air pollution on the welfare of urban residents. • Policy suggestions suggested that air pollution should be balanced against the welfare of residents, and should not be cleaned up by "one size fits all" in the early stages of economic development. Air pollution and its effects are important issues of human society. However, few literatures on the effect of air pollution on urban residents' welfare considered the cost of migration. This paper constructs a novel spatial general equilibrium model and studies the impact of air pollution on urban residents' welfare in 274 cities at and above the prefectural level in China from 2007 to 2017, and investigates the role of migration costs. The theoretical analysis and empirical research show that air pollution has a significant negative impact on the welfare of residents. Further, the simulation results indicate that the reduction of migration cost and the improvement of air quality accounts for roughly 24.65% improvement of resident's welfare from 2007 to 2017 in China. Another conclusion is that there is an inverted U-shaped relationship between resident's welfare and air pollution. On another side, migration costs play a moderating role in the impact path of air pollution on residents' welfare. When the migration costs fall, it will help residents to move out of cities with poor air quality and improve the resident's welfare. The policy suggestions are as follows: (1) In the process of sustainable development, local governments need to coordinate the phased characteristics between air pollution and residents' welfare, effectively improve the livable degree of city and urban economic sustainability, and prevent the brain drain caused by excessive migration of residents. (2) Local governments should lower the migration costs between cities by deepening the reform of the household registration system, so as to promote the free flow of labor and ultimately improve the welfare of residents. [ABSTRACT FROM AUTHOR]

In an attempt to investigate the impact of major events on urban air quality in terms of the extent, duration and spatial scope, data on the daily air quality index and the concentrations of individual pollutants are collected in 140 cities of China from January 2, 2015, to November 28, 2017. Based on a spatial differences-in-differences, the impact of major events, such as political conferences, sporting events at the national level, on urban air quality in the dimensions of time and space are explored. It is concluded that major events not only affected the air quality of the host city, but also exercised influence on the air quality of the surrounding areas. Recommendations for mitigating the impact of major events on urban air quality have been proposed, such as establish regional atmospheric environment management system and formulate regional unified standards for pollutant discharge, industrial access and law enforcement. [ABSTRACT FROM AUTHOR]

• A dynamic general equilibrium model about air pollution in china was established. • Empirical impacts of environmental regulation on air pollution in china were analysed. • Reasons about recent decline in china's air pollution were provided. In recent years, the average concentration of PM 2.5 in China's air pollution has generally declined, but literature discussing reasons for the decline are scarce. This study provides an explanation of the reasons for the decline in China's air pollution through theoretical model construction and simulation. Firstly, a DGE (Dynamic General Equilibrium) model, including time and space dimensions, is used to describe the mechanism for energy structure adjustment and environmental regulation affecting air pollution in China. Secondly, the parameters of the theoretical model are adjusted for simulation. The simulation results show that the government environmental control has positive policy effect, both in reducing air pollution and in promoting economic growth, while energy structure adjustment only works in curbing air pollution. Further simulations found that the effectiveness of government environmental control depends on whether there are regional differences in policy implementation and the choice of policy paths. Thirdly, panel data from 286 cities at prefecture level and above in China from 2010 to 2018 verified the simulation. The empirical results verified the availability of government environmental control and energy structural adjustment in improving air quality. From the analysis of heterogeneity, the government environmental control showed better air pollution control effect in big cities, and the policy effect of government environmental control was gradually improving over time. The following policy implications are proposed: research on alternative energy sources, adjustment of energy structure, and the coordinated development of government environmental control in various regions are the main strategies for improving air quality. Adopting the "fast first and then slow" governance policy, designing the "north first and then south," and "heavy first and lighter" air pollution control measures can achieve better control effects. Figure 1 Research framework [Display omitted] [ABSTRACT FROM AUTHOR]