The article presents a comprehensive study on renewable energy sources, focusing on the classifications, challenges, and potential solutions within the energy sector. It explores innovative methods such as biohydrogen production using microbial biomass paired with brewery by-products, emphasizing the role of sustainable practices in energy generation. The study underscores the importance of utilizing food and industrial wastes to extract valuable resources like omega-3 fatty acids, promoting waste management and resource optimization. Additionally, the research discusses advancements in renewable energy technologies, including photo-fermentative biohydrogen production from biowastes, indicating a transition towards cleaner and more sustainable energy sources. Overall, the article provides insights into the evolving landscape of renewable energy and highlights the opportunities and challenges in harnessing these sources for a more sustainable future.