Biofuels include cellulosic ethanol, biodiesel, methanol and biobutanol. These fuels have similar performance characteristics to their fossil fuel equivalents and can therefore be easily incorporated into existing fuel supply chains and infrastructure. Further characterisation of biofuels includes first-generation biofuels or conventional biofuels, which are made from sugar, starch or vegetable oils, and second-generation or advanced biofuels, which are manufactured from various types of biomass.