This book presents the proceedings of the International Conference on Green Materials and Manufacturing Technology, held on 23-25 June 2025, at Churchill College of University of Cambridge (UK). It brings together a comprehensive collection of research papers showcasing the latest developments in green materials, with a particular focus on three key areas: green energy production and storage technologies, green synthesis of materials, and sustainable waste recycling and upcycling. The rapid technological advances of the past century have driven remarkable industrial and societal progress but also introduced significant environmental and health challenges. In this context, the development of green materials has become essential. This volume highlights cutting-edge research aimed at addressing these global challenges and advancing sustainable solutions for the future.