Clean fuels, particularly biofuels, play a vital role in reducing greenhouse gas emissions and fostering sustainability in the energy sector. Derived from organic matter such as plants, algae, or agricultural waste, biofuels offer a renewable alternative to fossil fuels. Ethanol and biodiesel are prominent examples, produced from crops like corn, sugarcane, and soybeans, or from non-food sources like algae. These fuels release lower net carbon emissions since the plants used in their production absorb carbon dioxide during growth. Furthermore, biofuels contribute to energy security by diversifying fuel sources and decreasing reliance on imported oil. Despite challenges like land use competition and sustainability concerns, ongoing research aims to enhance biofuel efficiency and address environmental impacts, ensuring they remain a cornerstone of clean energy solutions.