Biofet is a type of fuel that is made from plants or animals. It is renewable and can be used to power vehicles or to produce electricity. Biofuel is made by breaking down either plant or animal materials into simple molecules that can be burned as fuel. The process of making biofuel is called 'bio-refining'. The molecules that are released when biofuel is burned are much cleaner than the molecules released when burning fossil fuels, so it is a better way to power things.