Fig. 2: Key cancer-related pollutants in river basin-specific contexts.
From: Spatial association of surface water quality and human cancer in China

a Ranked incidence of 11 selected cancers in 10 river basins with different grades of surface water quality. CAMS, proposed “Cluster Analysis” of Multi-pollutants in Space design. b Key pollution indicators affecting total cancer incidence in each river basin, assessed by SHapley Additive exPlanations (SHAP) values generated from an extreme gradient boosting algorithm.