Nature – Braun et al. (2025): Multiple planetary boundaries preclude biomass crops for carbon capture and storage outside of agricultural areas
Johanna Braun, Constanze Werner, Dieter Gerten, Fabian Stenzel, Sibyll Schaphoff, Wolfgang Lucht IN: Communications Earth & Environment, 6, https://doi.org/10.1038/s44221-024-00361-z
Six of nine planetary boundaries are currently transgressed, many related to human land use. Conversion of sizeable land areas to biomass plantations for Bioenergy with Carbon Capture and Storage (BECCS) – often assumed in climate mitigation scenarios to meet the Paris Agreement – may exert additional pressure on terrestrial planetary boundaries. Using spatially-explicit, process-based global biogeochemical modelling, the authors systematically compute feedstock production potentials for BECCS under individual and joint constraints of the planetary boundaries for nitrogen flows, freshwater change, land system change and biosphere integrity (including protection of remaining forests), while reserving current agricultural areas for meeting the growing global demand for food, fodder and fibre.