Concrete remains the primary material for high-rise construction worldwide, including in Chicago, but its carbon footprint—primarily from Portland cement—has drawn scrutiny. This session challenges the assumption that concrete can't be sustainable, exploring how low-carbon mix designs using supplementary cementitious materials can reduce embodied carbon by up to 40%. The presentation discusses how Life Cycle Analysis, material choice, and structural system evaluation impact both embodied and operational carbon, and demonstrates how low-carbon concrete can meet sustainability, budget, and schedule goals—leveraging existing construction industry expertise.