Making Roman concrete produces as much CO2 as modern concrete
Builders in ancient Rome used a special kind of ancient concrete to construct their aqueducts, bridges, and buildings. But is Roman concrete more sustainable than the Portland cement used in today's concrete? The answer is more nuanced than one might think, according to a new paper published in the journal iScience. Roman concrete produces as much CO 2 as modern methods, but fewer air pollutants. As we've reported previously, like today's Portland cement (a basic ingredient of modern concrete),