Energy potential, emissions savings, and land management through pruning biomass in the Canary Islands

Abstract

Canary Islands' energy system relies on imported fossil fuels for more than 80% of its supply, leading to high costs, vulnerability, and elevated greenhouse gas emissions. This study evaluates the energy and climate potential of pruning biomass generated across the archipelago using a species-based inventory combined with absorption/emission factors and lower calorific value (LCV). Results indicate an annual availability exceeding 650,000 t of dry biomass, corresponding to a gross energy potential of more than 2800 GWh/year and the avoidance of approximately 0.62 MtCO₂eq/year if recovered before decomposition. Pinus canariensis needle litter represents over 90% of the resource, while urban pruning contributes locally to waste management. The novelty of this work lies in the integrated assessment of energy potential, emissions mitigation, and land management, applied for the first time to the Canary Islands. Overall, pruning biomass emerges as a relevant local renewable resource for the island energy transition and the circular economy.