The Future of Low-Carbon Cement

Roads, bridges, buildings, runways, homes, dams, canals and more are all built with concrete. The coarse, gray building material has been so ubiquitous throughout history that even the nearly 2,000-year-old Roman Colosseum was constructed with an ancient concoction of concrete. Despite all its benefits of strength and durability, there is a downside. Production of cement, primary ingredient in concrete, is responsible for a whopping 5 percent of human-generated carbon dioxide emissions. The good news: Some industry newcomers are creating cleaner versions of the versatile building material.

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