Biofuels are any kind of fuel made from living things, or from the waste they produce. We use the term biofuels to encompass any alternative substitute for petrol or diesel or other liquid fuel made from processing plant material or waste oil.
Biofuels are not a recent development, they have been around as long as cars have. At the start of the 20th century, Henry Ford planned to fuel his Model Ts with ethanol, and early diesel engines were shown to run on peanut oil. They have though seen significant attention recently due to humanity’s ever-dwindling supply of natural resources or more specifically our over-dependence on fossil fuels.