Do plants absorb harmful substances from the soil?

When the soil contains too many harmful substances, which exceeds the self-purification ability of the soil, it will cause changes in the composition, structure and function of the soil, and harmful substances or their decomposition products will accumulate in the soil and be indirectly absorbed by the human body through soil-plant-human body or soil-water-human body, which will endanger human health.

Don't pretend to understand on the fourth floor. Almost 99% of the original pesticides are organic and insoluble in water, and 100% pesticides are toxic to people, but the toxicity is different.

There are also pesticides in the body, which are absorbed by plants and transported to specific parts of the body to kill insects and treat diseases. If it is decomposed before internal inhalation, is it still a pesticide? It's a fake medicine for ordinary people.