A study by UC Davis and Stanford University reveals that construction materials like concrete and plastic can absorb billions of tons of CO2, aiding in reducing greenhouse gas emissions. The research suggests using biochar in concrete, carbon-loaded artificial rocks, and biomass-based plastics to sequester carbon, with a significant potential in carbonateable concrete aggregates. This approach uses low-value waste, enhancing economic value and supporting a circular economy. While some techniques need further validation, many are ready for adoption, offering a viable path to carbon storage in the built environment.