Rock weathering is a process whereby atmospheric CO2 reacts with silicate minerals, promoting formation of C-rich carbonate minerals. Speeding up this process has the potential to capture up to 1.25 tonnes of atmospheric CO2 per tonne of input. However, natural processes are slow. We propose to use protein engineering, discovery of naturally evolved pathways, and bioinformatics to identify and optimize enzymes capable of accelerating mineral weathering for CO₂ capture.