This contribution offers a thorough analysis of challenges and opportunities related to the adoption of sustainable energy policies in specific developing countries (i.e., Albania, Brazil, India, Kenya). The use of renewable energy sources must be increased if the world is to meet its climate goals and alleviate the negative effects of fossil fuel consumption. However, due to fiscal restrictions, institutional barriers, and technology limitations, developing countries face particular challenges in adopting such policies. In order to help these countries move towards a sustainable energy future, this study analyses these issues and suggests viable solutions for policymakers.