Life cycle assessment of organic chocolate production in Peru

Limited studies have been conducted in Latin America related to the environmental profile of cocoa and chocolate production using Life Cycle Assessment (LCA). The current study conducts a cradle-to-gate LCA of the production of organic chocolate products in Peru, considering cocoa cultivation practices by a group of 21 female producers located in central Peru in the year 2022. Data were collected on-site at cultivation sites and processing plant using questionnaires with the technical staff. Beyond fossil and biogenic emissions linked to cultivation, transport of dried cocoa, and manufacturing activities at the chocolate producing plant, carbon capture on fields by cocoa and shading trees was modeled and included in the carbon balance. A total of 8 impact categories were selected, considering different environmental compartments. Results for global warming using the main scenario show a range of values from 4.33 kg CO₂eq per kilogram of final chocolate product to 4.88 kg CO₂eq. Most impacts are derived from the production of dry cocoa beans and, to a lesser extent, upstream sugarcane production. However, important differences were evident when the individual cocoa producers were analyzed, with agroforestry systems presenting lower greenhouse gas (GHG) emissions than cocoa monocrops. Regarding water scarcity, the activities at the chocolate processing plant were found to contribute more than water use at the cocoa cultivation sites. For other impact categories, toxicity emissions at the cultivation site were relatively low given the organic characteristics of the fields, which do not use conventional pesticides. The post-harvest management of the cocoa pods (i.e., composting) is a critical source of GHG emissions. Hence, adequate composting conditions maintain methane emissions low, but direct return of the pods to the field can generate a substantial increase in GHG emissions. Carbon sequestration from above ground biomass, mainly from shading and cocoa trees, appears to mitigate an important fraction of these emissions if shading is homogeneous and sufficiently dense across the fields.