Metaverse, the combination of AR, VR and immersive digital spaces, is quickly changing how people interact and enjoy using the internet. When this ecosystem continues to prosper, a main concern is building infrastructure that is secure, efficient and sustainable. With Wireless Sensor Networks (WSNs), real-time data about the environment and its context can be acquired, matching what happens in the real world with what happens virtually. At the same time, Blockchain makes it possible to have trust that isn’t centralized, safety for data-handling and permanent records-needed traits for a transparent and user-controlled Metaverse to flourish. But, using together these two important technologies should always be done with the environment in mind. The huge amounts of data processed and the energy needed cause a lot of environmental problems. The next section shows a new framework combining energy-saving WSNs and energy-aware Blockchain protocols to create a greener and more flexible Metaverse platform. To deal with both effectiveness and the environment, the system focuses on automating smart contracts and using Proof-of-Stake (PoS) and Directed Acyclic Graphs (DAGs) for consensus. Looking at comparative analyses and simulation results shows this style of network saves both energy and carbon emissions while providing high scalability and security. By including helpful design methods, how-to guidelines and case studies, this chapter helps researchers, engineers and developers who focus on sustainability, decentralization and immersive technologies. It creates the base to develop the next generation of infrastructure for the Metaverse that is scalable, secure and environmentally friendly.