Abstract

Both biofuels and BECCS serve the purpose of reducing the concentration of carbon in the atmosphere, biofuels by reducing the quantity of CO2 newly added and BECCS by removing the CO2 already emitted. Both rely on the large-scale growth of biomass and hence compete with food production for arable land. Consequently, the implementation of both at large scales potentially endangers food security. Given this conflict and the need for climate action, this paper discusses whether there are differences between the ethical implications of mitigation by biofuels and geoengineering with BECCS. We apply a principlist approach, specifying and weighting four key principles of climate ethics: the polluter-pays principle, the ability-to-pay principle, the equal-per-capita principle, and the procedural involvement principle. Because the ethical and practical implications of BECCS and biofuels have many parallels, applying these four principles identifies relevant moral differences to decide between these two technologies.