Measuring and Mitigating GHGs: Coffee

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.

• GHG emissions for coffee vary widely, ranging from 3 to over 40 kgCO2e/kg of roast coffee (RC), with an estimated average of 20 kgCO2e/kg RC. The primary drivers of these emissions are land-use change (LUC), fertilizer application, and effluent from wet-processing.
• Land-use change, specifically the clearing of forests for coffee, is a major but often excluded contributor to carbon footprints. LUC emissions can reach 35 kgCO2e/kg RC depending on location, with a global average estimate of approximately 6.6 kgCO2e/kg RC based on World Resources Institute data.
• On-farm emissions range from 0.9 to 8 kgCO2e/kg RC, primarily stemming from synthetic fertilizer production and nitrous oxide (N2O) emissions from fertilizer and crop residues. Polyculture systems sequester significantly more carbon (approximately 3x to 4x more) than monoculture systems, though the impact on yields remains a subject of debate.
• Coffee processing emissions average 5.5 kgCO2e/kg RC, with wet processing being more emission-intensive than dry processing due to the decomposition of organic matter in wastewater. This decomposition can add between 0.9 and 16.8 kgCO2e/kg RC, though it is frequently omitted from studies.
• Post-processing emissions are driven by packaging and brewing methods. Single-use pods can increase the footprint by 0.85 to 3.23 kgCO2e/kg RC, and automatic coffee machines emit more (2.5 to 6 kgCO2e/kg) than French presses or drip filters (1 kgCO2e/kg RC) because they use electricity to keep water warm.
• Mitigation potential is highest in preventing further deforestation and improving fertilizer use. Other strategies include treating wet processing effluent for use as fertilizer or biogas, and promoting agroforestry to sequester carbon, although the latter may potentially reduce yields.

APA

Villagomez, A., Carvajal, F., Silver, J., Garden, L., Palomo, L., Hartsook, M., Harrison, R., Devine, K., & Moberg, E. (2022). Measuring and Mitigating GHGs: Coffee. WWF International. https://www.worldwildlife.org/documents/119/2o8dri8jim_MOBERG_GHG_Brief_COFFEE_09_22_v4.pdf

Chicago

Villagomez, Andrea, Flora Carvajal, Jade Silver, Leah Garden, Lucia Palomo, Maile Hartsook, Remi Harrison, Katherine Devine, and Emily Moberg. Measuring and Mitigating GHGs: Coffee. WWF International, 2022. https://www.worldwildlife.org/documents/119/2o8dri8jim_MOBERG_GHG_Brief_COFFEE_09_22_v4.pdf.

Wikipedia

{{cite report |last1=Villagomez |first1=Andrea |last2=Carvajal |first2=Flora |last3=Silver |first3=Jade |last4=Garden |first4=Leah |last5=Palomo |first5=Lucia |last6=Hartsook |first6=Maile |last7=Harrison |first7=Remi |last8=Devine |first8=Katherine |last9=Moberg |first9=Emily |title=Measuring and Mitigating GHGs: Coffee |publisher=WWF International |date=19 September 2022 |url=https://www.worldwildlife.org/documents/119/2o8dri8jim_MOBERG_GHG_Brief_COFFEE_09_22_v4.pdf |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{villagomez2022measuring, author = {Villagomez, Andrea and Carvajal, Flora and Silver, Jade and Garden, Leah and Palomo, Lucia and Hartsook, Maile and Harrison, Remi and Devine, Katherine and Moberg, Emily}, title = {{Measuring and Mitigating GHGs: Coffee}}, institution = {WWF International}, year = {2022}, month = sep, url = {https://www.worldwildlife.org/documents/119/2o8dri8jim_MOBERG_GHG_Brief_COFFEE_09_22_v4.pdf}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }