What are the alternative sources of fuel?
Alternative Fuel OptionsAlcohols, e.g., ethanol and methanol.Biomass-based diesel fuels. Biodiesel (fatty acid methyl esters, FAME) … Methane, e.g., natural gas, biogas and synthetic natural gas (SNG)Liquefied petroleum gas (LPG)Hydrogen.Synthetic fuels.Dimethyl ether (DME) and other heavier ethers.Ammonia.