In the realm of nature, and sometimes also as a result of treatment arising as a result of the unawareness of people, signs are destroyed over time, which is why, above all, the informing of people about their existence is necessary for their preservation.
Looduse meelevallas ja vahel ka inimeste teadmatusest tuleneva kohtlemise all olevad märgid ajapikku hävivad, seepärast on nende säilimiseks vajalik eelkõige inimese teadvustamine nende olemasolust.