Biodiesel

Biodiesel is a fuel made from a vegetable oil by chemically reacting lipids with an alcohol. Biodiesel is used as a alternative fuel replacing fossil fuel for diesel engines, being used by itself or combined with petroleum diesel. The reaction is shown below:

Biodiesel can be used as vehicular fuel, heating oil, cleaning oil. Some typical yields are from chinese tallow, palm oil, coconut, rapeseed, soy (image below), peanut, sunflower.

Soy biodiesel. (Source)