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The document analyzes GHG emissions from coffee production, ranging from 3 to over 40 kgCO2e/kg roast coffee, with an average of approximately 20 kgCO2e/kg. It identifies land-use change, fertilizer use, and wet-processing effluent as the primary emission drivers. The briefing highlights that while polyculture systems sequester more carbon than monocultures, the overall footprint is highly variable based on location and practice. Key mitigation strategies include preventing deforestation, treating processing effluent, and improving fertilizer management, though implementation is challenged by the prevalence of smallholder farming.