The document discusses various non-conventional and advanced fuels that are more eco-friendly alternatives to fossil fuels such as biogas, hydrogen, and bio-diesel. It provides details on hydrogen, biomass, ethanol, and bio-diesel - describing how they are cleaner sources of fuel that can help reduce greenhouse gas emissions and global warming. These alternative fuels are important sources of renewable energy and can offer local economic opportunities while being less harmful to the environment than fossil fuels.