The presented learning curve for grants in this figure represents a scenario where a government wants to spend $3.5 billion on grants (equivalent to the sum made available by the US government in their Bipartisan Infrastructure Bill of 2021) to pay for the scale-up of a technology. Grants have a high potential to reduce the FOAK costs, with a median reduction of 68% for the solid sorbent process and around 58% and 63% for the KOH-Ca looping and MgO ambient weathering processes, respectively.