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Biology, 13.12.2019 00:31 nyceastcoast

Cities fall under the category of urban ecosystems. urban ecosystems include nature, humans, and animals in a (mostly) human-built environment. energy flow, nutrient cycles, and resource use are all necessary to maintain an urban ecosystem. most urban ecosystems are heterotrophic because they depend on materials and energy from outside their boundaries.

the significance of this reliance on outside resources is ―

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