by Alix Underwood
Like the economy of nature, the human economy has a “trophic” structure. In nature, nutrition and energy flow from plants to herbivores to carnivores, with each of these comprising a trophic level of the ecosystem. In the human economy, materials and energy flow from agriculture and other extractive activities to heavy manufacturing to light manufacturing. Both economies include service providers, such as pollinators in nature and the transportation sector in the human economy.
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