Question

how bio fuels are made

Answer 1

They are made from dead and decayed wasges of nimals burried under soil for many years together

Answer 2

Natural oils from plants like oil palm, soybean, or algae can be burned directly in a diesel engine or a furnace, or blended with petroleum, to producefuels such as biodiesel. Wood and its byproducts can be converted into liquid biofuels, such as methanol or ethanol, or into woodgas.