Why does the earth not run out of substances from which living organisms have been

Why does the earth not run out of substances from which living organisms have been building for millions of years and continue to cost their bodies?

This is due to the fact that there is a cycle of substances in nature. The so-called biocenoses in biology. In addition, evolution is constantly taking place, less viable forms disappear. Thus, organisms adapt to living conditions. New genetic material is passed on to subsequent generations.



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