In 2024, sustainability is a pressing concern for CNC machining industries worldwide. This article examines strategies and innovations aimed at reducing environmental impact throughout the machining process. Topics include the adoption of eco-friendly machining fluids, recycling of metal chips and coolant, and the implementation of energy-efficient CNC machines. Additionally, advancements in digital twin technology and life cycle assessments are highlighted for their role in optimizing resource usage and minimizing carbon footprints. By prioritizing sustainability practices, CNC machine tools (https://boyiprototype.wixsite.com/prototyping/post/comparison-of-4140-and-52100-steel-alloys) machining companies can not only meet regulatory requirements but also enhance operational efficiency and appeal to environmentally conscious consumers.