The spatial differences of the synergy between CO and air pollutant emissions in China's 296 cities.

The emissions reduction of CO and air pollutants are the main task in China. The two have the same roots and they interact with each other. However, CO and air pollutants are quite different in space, so it is of great practical significance to explore the spatial differences of their synergy. As PM and O are more concerned at present, thus, this paper examined the decoupling of CO, PM and O from GDP in China's 296 cities using the latest available data from 2015 to 2016. And the spatial differences of synergy among CO, PM and O were quantitatively analyzed by using spatial autocorrelation analysis and geographically weighted regression model. The results showed that: (1) The cities achieving the three synergy emissions reduction were mainly in the southeast of China. (2) Only 26 cities had achieved the strong decoupling of CO, PM and O from GDP. (3) The synergy characteristics between CO and PM, CO and O were different. This paper put forward the policies according to the conclusions.