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).

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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