The global transition towards sustainable and renewable energy sources has become a paramount concern in addressing climate change and ensuring long-term environmental sustainability. International investment law plays a pivotal role in shaping the landscape of renewable energy development by providing legal frameworks and investment mechanisms that can incentivize and support renewable energy projects. This project seeks to provide a comprehensive analysis of the legal and ethical implications of leveraging international investment law to promote renewable energy initiatives, aiming to shed light on the legal frameworks, ethical considerations, and policy implications that influence the advancement of renewable energy development at the international level. The introduction will outline the objectives, scope, and methodology employed in the research, emphasizing the need to understand the complexities of utilizing international investment law to advance renewable energy development and the implications for global energy governance and environmental sustainability.