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Green cement would use carbon emissions instead of producing them
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An increasing number of companies are circumventing government efforts in order to invest in green technologies that will separate and trap carbon emissions in a series of "beneficial products," the New York Times reports.
Traditionally, scientists and government experts have advocated for a method that would capture and separate carbon dioxide from emissions and then pump it underground using a large network of pipelines and injection facilities.
This process would require a massive collaborative effort on the part of state and federal governments, as well as insurance companies. However, one salesman, Brent Constantz, uses carbon emissions to produce his product.
Constantz, who is also a consulting professor at Stanford University’s School of Earth Sciences, is marketing what he calls "green cement," the Times reports. To make the cement, Constanz creates a green aggregate by injecting carbon dioxide harvested from power plant emissions into seawater, which he then sells for a profit.
Currently, cement is made by heating limestone in high-temperature, coal-fired kilns, giving off carbon dioxide – making cement makers the nation’s third largest producer of carbon emissions. Green cement, on the other hand, would be made by subtracting carbon dioxide.
However, Constantz believes that if state and federal governments were to impose a tax on carbon emissions, his "green cement" would gradually begin to replace conventional cement, the paper writes.
While "green cement" may seem novel to many Americans, some companies worldwide have been producing their own versions since as early as 2000. South Africa-based cement producer Afrisam recently introduced its first "ecocement," Engineering News reports. The cement, CEO Stephan Olivier told the magazine, is a blend of high-performance cement and mineral components.
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