Kannegieter & Medlock (2026): Additionality constrains investment in carbon sequestration
Stan Kannegieter and Kenneth B. Medlock, IN: npj Climate Action, https://doi.org/10.1038/s44264-026-00155-8
Additionality is a structural constraint that only recognizes land-based carbon sequestration if it would not have occurred without carbon payments. This discourages large-scale investment because it removes a significant portion of the potential carbon storage asset. Here, the authors examine the effects of replacing the additionality requirement with a carbon asset class that rewards carbon accumulation from carbon amendments on soil organic carbon (SOC) sequestration on cropland. They construct and calibrate an economic model focused on crop and carbon farming in Texas.