Biodiesel is a type of fuel that is made from plants or other types of biomass. It can be used to power cars or other machines just like regular diesel fuel. The big difference is that biodiesel is cleaner and reduces pollution. That’s because when it is burned, it produces less pollution than regular diesel. Biodiesel can be made from plant oils, used cooking oil, and even animal fats. When these oils and fats are mixed with certain chemicals, they turn into biodiesel.