1. Environmental pollutants can enter the human body through air, soil, water, food and other media to cause harm;
2. The object of environmental pollutants is the whole population, including the old, the weak, the sick, the disabled and even the fetus;
3. The level of environmental pollutants in the general living environment is very low, but it can cause harm to human body for a long time;
4. There are many kinds of pollutants in the environment, which can enter the human body at the same time and have a joint effect. The combined effect of environmental pollutants can be expressed as additive effect and increasing effect.
Strong, antagonistic or irrelevant.