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Metric
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Dimensions
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Formula
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Environmental Significance
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Metals recycling rate
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Percentage
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Quantity of recycled and secondary metals consumption/Total metals consumption
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Materials efficiency and cyclicity
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Renewable net carbon balance
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Percentage
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Forest growth/Forest products harvested
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Global carbon balance of sources and sinks, land use, ecosystem disruption
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Output intensities
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Green productivity
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Percentage
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Quantity of solid wastes/Quantity of total solid physical outputs
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Materials efficiency and cyclicity
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Intensity of use for residues
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MMT/$106 GDP
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Generation quantity for selected materials waste streams/GDP in constant dollars
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Relationship of waste generation to economic activity
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Leak indices
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Dissipation index
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Percentage
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Quantity of materials dissipated into the environment/Total material outputs
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Materials efficiency and cyclicity, media contamination
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Nutrient and metals loadings
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mg/liter and kg/km2
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Concentrations of pollutants in water bodies, and land deposition of nutrients and heavy metals/Defined area
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Materials monitoring and accounting, media contamination
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Environmental trade index
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MMT
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Net mass value of waste and emissions generated from foreign trade in manufactured products and raw resources
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Domestic resource consumption, domestic environmental burden caused by exported goods
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Mining efficiency
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Mining wastes
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Dimensionless
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Quantity of wastes generated/ Ton of finished product
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Solid wastes, acid mine drainage
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By-product recovery
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Dimensionless
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Total by-product recovery/Total output
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Materials efficiency, solid wastes
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