1, universality: ubiquitous environmental pollutants will harm human health.
2. Long-term: The impact of environmental pollution on health has the characteristics of great harm, strong concealment and long incubation period. Long-term exposure will cause chronic injuries over time.
3. Diversity: The harm of environmental pollution is not limited to human health, but also causes serious damage to the environment.
4. Complexity: The impact of environmental pollution on health involves many factors, such as individual differences, exposure amount and intensity, exposure time, physical and chemical properties of pollutants, environmental media types, etc., and most of them are combinations.