How can a person restore the number of animals in a certain area?

Man should not interfere with nature. We should not massively destroy entire species of animals and try to slow down the process of natural selection, as this can very badly affect other species and humans. Every hour 3 species of animals disappear and we cannot do anything about it. Therefore, attempts to save several dozen species look ridiculous against the background of statistics. But man is still engaged in the restoration of the number of animals. To do this, you need to allocate a territory that will be spared the natural enemies of the species. So they begin to multiply faster and the number increases.