There is a collorary to our economic system in nature. It’s not considered a single subject or discipline but involves a mixture of physical geography with ecology, biology and so on. Nature is truly circular to the extent that the outputs of one system feeds into the input of another and the overall grand scheme of things is in a kind of dynamic equilibrium that eventually shifts over time.
For a while humans have mimicked nature in creating circularity in our economy. And then we gave up because it was easier to scale things up and create wastage in order to fulfill profit motives. The unequality in an economy, the more wastage is produced because production gets inevitably skewed towards satisfying a demand that is aligned more to the distribution of “means” rather than a distribution of “needs”.
Nature behaves differently because the currency of nature is multi-dimensional and rich. There is no “monetisation”; nature do not base its value on a single commodity. You can’t exchange one calorie for another easily within the diet of most animals.
Real circularity involves richness that the industrial capitalist manner of approach cannot replicate.