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Figure 8 illustrates the differences between a natural ecosystem and an urban-industrial ecosystem.
A human ecosystem is fossil energy powered by high input and throughput and can be divided in urban-industrial ecosystem or agro-industrial.
The natural ecosystem is relatively closed and comprises self-regulating cycles, however the urban-industrial ecosystem is open to large imports of foreign material and toxins and unless we add detoxification and recycling processes it creates a disturbing influence on the biosphere.
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