水泥科学家布伦特Constantz希望混凝土清理脏煤的“英雄”。“事实上,煤是不会消失,”他说。“我们需要满足全球电力需求没有排放更多的碳。”His answer? A new type of concrete that sequesters carbon without disturbing its traditional binder: portland cement. Slide Show Illustration: Calera Corp. How the Calera Process Works Photo: Tudor Van Hampton / ENR In Las Vegas, Constantz said he can use aggregate to store carbon in concrete. This past summer, the Stanford University professor’s Los Gatos, Calif.-based startup, Calera Corp., began making cement