What role do lichens play in nature and human life?

The value of lichens is quite large. They settle first in the most barren places. When they die, they form humus on which other plants can live. Lichens are food for some animals. Some lichens serve as raw materials for the chemical industry.

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.