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Jul 10, 2021, 7:30 am148 pts
Ars Technica
Enlarge / The hope is future concrete can be a lot more environmentally friendly than concrete put down in 1972. (credit: Denver Post via Getty Images) For Bryan Kalbfleisch, cement is a way of life. “I was born and raised in the ready-mix concrete business,” says the New Jersey-based chief executive,…
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