XPRIZE Projects Aim to Convert CO2 Emissions, but Skepticism Remains

Scientific American: One pioneering team hopes to use carbon dioxide to make a stronger form of cement. Another wants to use carbon to make bioplastic. Still another is planning to transform CO2 into solid carbonates that can be used as building materials.

The XPRIZE Foundation unveiled 10 teams yesterday as semifinalists in its $20 million contest to find a solution to carbon emissions.

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