Effects of Water Pollution on Human Health and Disease Heterogeneity: A Review Background: More than 80% of sewage generated by human activities is discharged into rivers and oceans without any treatment, which results in environmental pollution and more than 50 diseases. 80% of diseases and 50% of child deaths worldwide are related to poor water quality. Methods: This paper selected 85 relevant papers finally based on the keywords of water pollution, water quality, health, cancer, and so on. R...