What is the function of the biological circulation of substances in the biosphere?

So that the biosphere does not cease to exist and so that its development does not stop, the circulation of biologically important substances must constantly take place on Earth, This means that after use they must again go into a form suitable for assimilation by other organisms. This transition of biologically important elements from link to link, which is carried out on the scale of the entire planet at a certain cost of energy, the source of which is the Sun, is called a geological, or large, cycle.

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