Recent advancements in Kubernetes architecture, particularly the deprecation of Docker as the default container runtime in favor of lightweight alternatives like containerd and CRI-O, present a valuable opportunity to reduce the carbon footprint of technology infrastructure. Unlike Docker, which operates with additional layers such as the Docker daemon, containerd and CRI-O are optimized for direct, efficient container management. This shift results in lower CPU, memory, and storage overhead, ultimately minimizing energy consumption across cluster nodes. Coupled with server consolidation and virtualization strategies — where multiple applications and services are hosted efficiently on fewer physical machines — organizations can significantly decrease hardware requirements, reduce electricity usage, lower cooling demands, and mitigate electronic waste. Together, these practices not only improve system performance but also contribute to more sustainable, environmentally conscious IT operation