This book presents selected papers from the Global Conference on Green Construction Materials and Practices 2025 (GCGC 2025) during February 5-6 in Karachi, Pakistan. The conference contributions include academics and industry practitioners from the cement and concrete sectors, discussing the sustainability of the construction sector by fostering collaborative scientific discussions and promoting eco-friendly materials in alignment with practices of green construction. The topics discussed are mainly divided into 3 main thematic topics (1) Green Construction Materials-Innovative/Sustainable Construction Materials, Properties of Low-Carbon Cement, Composites and Concrete, Chemical Additives for Low-Carbon Cement and Concrete; (2) Sustainable Construction-Low-Carbon and Sustainable Construction Practices, Circular Economy in Construction, Life-Cycle Assessment and Environmental Impact; (3) Case Studies and Best Practices-Policies and Regulations, Advanced Modeling and Simulation Techniques, Renewable Energy Integration, Energy Efficiency. This book offers a timely reference for both academics and professionals in the broad field of green construction.