Environmental issues and cleaner production are getting increasing attentions currently, making the clean production and sustainable consumption with low emissions significant. Traditional energy vehicles are increasingly unsuitable for the development of current society. It's a trend in the current vehicle market to accelerate the substitution of new energy vehicles for traditional energy vehicles. This paper makes a theoretical study on the development of new energy vehicle market supported by the government. First, this paper establishes a Cournot duopoly model which includes domestic and imported new energy vehicle manufacturers. Through the analysis of this model, this paper argues that government support policies such as subsidies and tariffs can effectively expand the market share of domestic new energy vehicles with less technology. Yet this approach is unsustainable, because domestic

Urban air quality, which is related to the health of local residents of the Pearl River Delta Region, China, (PRD) has been a hot topic among the masses and academic circles. In addition to economic growth, China’s rapidly increasing urbanization rate has also brought great pressure on urban air quality, in the Region, where due to its huge economic size and population, urban air quality has become the focus of local residents. This study first analyzed the spatio-temporal trends and correlation of land use and PM2.5 average annual concentration, which represents air quality in the PRD from 2000 to 2018, and according to Moran index, PM2.5 concentration in this area has spatial correlation in the study time. Secondly, the spatial error model of the PRD was constructed by using spatial effect, spatial modeling theory and spatial model estimation. The spatial-temporal evolution and influencing factors of PM2.5 concentration were discussed in fixed overall effect. The results showed that the area of cultivated land in the PRD decreased and the area of artificial surface increased year by year, while the PM2.5 concentration increased first and then decreased. In addition, the area of cultivated land and forestland were negatively correlated, while the area of grassland and water body were positively correlated with PM2.5 concentration. The conclusion of this study has a certain theoretical reference for urban land use planning and air quality assurance.

Increased emissions from road traffic resulting from the increase in car ownership have put enormous pressure on China’s environmental problems. To solve this problem, the Chinese government has attached great importance to the development of a new energy vehicle industry. This paper summarizes the incentive policies of China’s new energy vehicle industry. By sorting through the incentive policy system of the new energy vehicle industry, we find that the Chinese government’s promotion policy for the new energy vehicle industry is a process of gradual transformation from being government-led to being market-led. In this process, with the decrease of the subsidy amount, it is bound to cause a huge impact on the new energy vehicle industry.

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Although the compensation for house expropriation has increased significantly in recent years, the conflicts persist. The subjects in the expropriation process have multiple behavioral preferences, such as self-interest, loss aversion, and inequity aversion, and the expropriation process is hampered by extreme disputes on expropriation compensation. In order to make the houseowners agree to the expropriation immediately and tackle the root of extreme disputes, this paper establishes a two-stage sequential game model involving local government and two houseowners, analyzes the different payoff situations under multidimensional preferences, and finds out the optimal compensation standard. Then, through a case analysis, the TOPSIS method is used to determine the ideal strategy when the houseowners are simultaneously considering three preferences. The optimal compensation standard’s value is discovered to be significantly influenced by the houseowners’ behavioral preferences, but the compensation cannot be raised by excessive attention to the reference point and other houseowners.