This Carbon-Neutral Cement Is the Future of Infrastructure

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Popular Mechanics

We make more concrete than any other material on the planet. A group of engineers across the country want to turn that production process—which accounts for over 7 percent of the world’s annual greenhouse gas emissions—into a carbon-neutral, or even carbon-negative, process. And they’ll use microalgae to make it happen.

The team, led by engineers at the University of Colorado, University of North Carolina Wilmington, and the National Renewable Energy Laboratory, has shown it can manufacture biogenic limestone-based Portland cement without the need to quarry the limestone in a carbon-heavy process. Instead, they’re growing it.

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