Quantifying the influence of natural and socioeconomic factors and their interactive impact on PM2.5 pollution in China

Note: X1 donates the first factor, X2 donates the second factor, and X1∩X2 is the interaction of the two factors. For example, in the pair of (IO, CO), X1 donates IO, X2 donates CO, and X1∩X2 is the interaction of IO and CO.155