What is Biodiesel?

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Biodiesel can be made from almost any plant which yields oil; typical mass production is centered on soyabeans in the United States, rapeseed (canola) in Europe, and palm oil in tropical locations. However, various experiments have been conducted using sunflower oil, cottonseed oil, peanut oil, linseed oil, olive oil, and many other varieties. Biodiesel can also be made from used cooking oil, animal fat, and from various unicellular organisms such as algae and bacteria. The chemical composition of biodiesel differs from source to source because each naturally-derived oil consists of a different mixture of hydrocarbon chains with different lengths, branching and degrees of saturation.