National Academy of Sciences estimates a global potential to sequester 3.4–5.2 GtCO 2 per year via BECCS without large adverse impacts.Ĭost estimates vary widely, with one recent expert assessment projecting costs of US$100–200 per ton of CO 2 sequestered and another projecting costs of US$20–100 per ton. Such projections have been met with intense skepticism, partly because of land-use requirements. Scenarios compiled by the Intergovernmental Panel on Climate Change (IPCC) suggest that limiting warming to 1.5☌ or 2☌ at the end of the century could involve sequestering roughly 5–10 billion metric tons of CO 2 (GtCO 2) per year via BECCS by 2100. A recent expert assessment estimates potential sequestration rates of 0.5–5 billion metric tons of CO 2 per year in 2050 with the possibility of much higher rates by 2100. Potential Scale and CostsĮstimates for the potential scale of BECCS vary widely. Smaller scale applications using agricultural residues or marginal agricultural land generally pose fewer risks. Many of these issues would arise only from very large-scale adoption of BECCS.
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