New recipe makes concrete that absorbs more CO2 than it emits

Concrete is one of the most common materials on Earth, thanks to its high strength and low cost – but it’s also one of the largest single sources of carbon dioxide emissions. Engineers at Washington State University (WSU) have developed a new method for making concrete that absorbs more carbon than it emits.

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Seawater-derived cement could decarbonise the concrete industry. Magnesium ions are abundant in seawater, and researchers have found a way to convert these into a magnesium-based cement that soaks up carbon dioxide. The

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