Researchers at the University of Tokyo have developed a method to distinguish between atmospheric and industrial carbon dioxide absorbed by concrete. By analyzing carbon isotope ratios, specifically carbon-13 and carbon-12, they can now quantify how much CO2 comes from industrial exhaust versus the natural environment. This breakthrough provides a technical foundation for more accurate carbon accounting in the construction industry. It allows companies to prove the origin of sequestered carbon, which is essential for the integrity of carbon trading markets and emissions reporting.
