The Metaverse is envisioned as a persistent, immersive digital environment that merges real-world data with virtual experiences. This paradigm requires strong and decentralized infrastructures with an energy-efficient approach to ensure the safe sharing of data, facilitate real-time interactions, and promote ecological consciousness. In line with this consideration, this chapter suggests a sustainable design based on two technologies: blockchain technology and Wireless Sensor Networks (WSNs). While WSNs provide context-aware sensing options that are vital for dynamic Metaverse environments, blockchain provides immutable, decentralized security for the data. Together they lay a solid groundwork for scalable and efficient interactions. To ensure the efficiency of energy conservation on the blockchain, the proposed architecture utilizes energy-efficient consensus mechanisms, such as Proof-of-Stake (PoS). Edge computing and low-power WSN protocols are in use so that latency can be decreased and the network performance can be enhanced. Smart contracts control access and data validation automatically to guarantee transparency and integrity among all interconnected nodes. Experimental analysis showed that the combined system presents a balanced compromise between low latency, low energy consumption, and high throughput, which posits it as suitable for sustainable, real-time applications in the Metaverse.