CDR Potential & Technology Readiness Level (by OceanVisions)
This schematic by OceanVisions helps us to visualize the landscape of technologies that attempt to utilize microalgae for carbon capture and sequestration, organized by technology readiness level (from 1-9, as used by NASA) and CD potential (from <0.1 Gt CO2/ year to >1 Gt CO2/year).
More at OceanVision's overview of State of technology