The liquid fuel derived from plant materials is commonly referred to as biofuel. Specifically, when it is in a liquid form, it is often classified as bioethanol or biodiesel.
- Bioethanol is typically produced from the fermentation of sugars found in crops such as corn, sugarcane, and wheat.
- Biodiesel is made from the oils and fats of plants (such as soybeans, canola, and palm oil) or recycled cooking oil.
Biofuels are considered renewable energy sources because they are derived from biomass, which can be replenished over time.