ARLINGTON, Va.—At concrete plants across the world, diesel mixer trucks take in a polluting blend of sand, gravel, water and cement. A facility outside Washington, D.C., is adding a new ingredient to clean up the process: carbon dioxide.
The hybrid material—known as “green” concrete—reduces the carbon footprint of one of the dirtiest industrial sectors in the world and is emerging as an alternative to carbon storage options such as underground wells and pipelines that require regulatory approval and local support.
