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The document introduces SEI-PCS, a modeling tool designed to overcome the limitations of traditional country-level footprinting by providing spatially explicit data on production-to-consumption systems. By integrating subnational production data, domestic trade flows, and international customs data, SEI-PCS allows for the tracing of commodities back to their origin to assess impacts such as carbon emissions, biodiversity loss, and deforestation. The tool is the foundation for the Trase initiative, which specifically monitors deforestation risks associated with agricultural commodities like soy in Brazil, Indonesia, and Latin America, helping companies and governments evaluate the effectiveness of zero-deforestation commitments and identify policy 'leakage' effects.