Knowing the laws of the migration of elements in the biosphere, place the collection sites for medicinal herbs in order of increasing health hazards that may arise from the use of these plants: in the city, next to highways, next to the railroad tracks, in the forest far from the settlement, near the village.
in a city, next to highways, next to a railway line, next to a village, in a forest far from the village.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.