On Monday, April 29th, 2024,CITIES organized an event on Carbon-Neutral Future. The urgency of mitigating climate change demands a profound transformation in the construction industry, particularly in urban areas where buildings are significant contributors to greenhouse gas emissions. This talk delves into the pivotal role of decarbonizing building materials in achieving net-zero emissions in cities. Drawing from recent advancements, we explore innovative approaches to develop and characterize sustainable construction materials as alternatives to conventional Portland cement. By synthesizing cutting-edge research on decarbonizing building materials, this talk advocates for a paradigm shift toward sustainable urban development. Through collaborative efforts and innovative solutions, we pave the way for a carbon-neutral future, fostering resilient and environmentally responsible cities.