Currently, the small market for removal credits generated by DACS is supported by companies pursuing voluntary offsets. However, verification, including the storage and life cycle project emissions and future monitoring, is currently (to an extent) based on trust, and although it is not concerning the voluntary market, it should at least be standardised going forward. This agrees with the ten key policy recommendations from an expert interview study by Sovacool et al., who suggested that ensuring net-negative emissions, alongside certification and compliance, is crucial. The work from Sovacool et al. contains many other insightful recommendations and should be considered complementary to the quantitative work on policy and deployment presented here. Another critical bottleneck for DACS deployment at scale is the availability of CO2 transport and storage infrastructure.