Abstract
As marine ecosystems increasingly face pressure from climate change and fossil fuel dependency, offshore renewable energy emerges as a crucial pathway toward sustainable development. This paper explores the vast potential of marine renewable energy sources—offshore wind, wave, tidal, ocean thermal, and solar—in reducing greenhouse gas emissions, enhancing energy security, and promoting a green maritime economy. The study emphasizes the importance of ecological assessment, integrated spatial planning, and community engagement in developing Vietnam’s marine energy sector. Notably, Vietnam’s offshore wind potential exceeds 1,000 GW within its Exclusive Economic Zone, offering transformative opportunities for decarbonizing maritime industries and meeting global climate goals. Case studies such as the Thăng Long offshore wind project (600 MW) exemplify the synergy between environmental awareness and actionable transition. While challenges remain, including high investment costs and ecological risks, the paper proposes solutions involving cross-sectoral cooperation, green technology deployment, and inclusive policy design. Ultimately, marine renewable energy is not only a technological necessity but also an ethical commitment to a cleaner and more resilient future.