Web 3.0 marks a transition toward a decentralized and transparent internet, utilizing blockchain and smart contracts to shift control from major corporations back to individual users. This evolution empowers people to own their data, enhance their privacy, and monetize their own content within a fairer digital ecosystem. Parallel to this, the Metaverse is emerging as an immersive virtual space where blockchain ensures the secure ownership and trade of digital assets like virtual land and art. Beyond social and economic opportunities, these technologies can support environmental sustainability by replacing physical goods with digital versions, thereby reducing waste.