Urban systems boundary broadly showing inflows (I), outflows (O), internal flows (Q), storage (S), and production (P) of biomass (B), minerals (M), water (W), and energy (E).
![](/media/records/Mainstreaming_Urban_Metabolism_Figure_1.large.png)
Urban systems boundary broadly showing inflows (I), outflows (O), internal flows (Q), storage (S), and production (P) of biomass (B), minerals (M), water (W), and energy (E). t = tonnes; J = joules; kWh = kilowatt-hours.
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This item is part of Mainstreaming Urban Metabolism
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