Why are there few fish in the water near villages and farms? how to deal with it?

This happens for several reasons. Primarily because of the activities of people. This is especially noticeable near farms. Unscrupulous farmers, as well as some people in the villages, drain the sewer into the reservoir. All sewage and poisons poison the fish. This happens very often. But people are already beginning to struggle with this because of the negative influence on themselves. People catch fish in water bodies. Therefore, as a rule, there are few fish near villages and farms in reservoirs. But if people understand the basic rules of behavior, then the fish feels fine.