Impact of human activities on haze in Beijing based on grey relational analysis

Based on the grey relational analysis of haze components and the factors associated with socio-economic development in Beijing, this paper found that social development activities, such as energy consumption per GDP unit, urban road construction and urban greening, have great impact on haze, including both promotion and inhibition impacts. It should be noticed that human activities which gained much attention before, such as ownership of motor vehicles and residential energy consumption, do not have a strong effect on haze according to our study, which is contrary to previous studies and government reports.