Underground markets can be created to pay land managers to rebuild soils, solving cities' environmental problems. Rapid topsoil formation through regenerative agricultural practices provides benefits like increased water storage and filtration, reducing flooding and drought. New monitoring and valuation tools can quantify these ecosystem services at landscape scales, facilitating performance-based carbon, water, and risk mitigation markets. Case studies demonstrate improved soil health and yields while decreasing inputs. A soil carbon challenge encourages accelerated topsoil formation to address climate change and resource security.