A new approach to evaluate regional inequity determined by PM_2.5 emissions and concentrations.

To check the validity of the model, the p -test was used, and the tendencies were classified into 5 categories: highly significant (−), ( R < 0 and p < 0.01); significant (−) ( R < 0 and 0.01≤ p < 0.05); no significant change ( p ≥ 0.05); significant (+) ( R > 0 and 0.01≤ p < 0.05); and highly significant (+) ( R > 0 and p < 0.01).

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