Biodiesel refers to a diesel-equivalent, processed fuel derived from biological sources (such as vegetable oils), which can be used in unmodified diesel-engined vehicles. It is thus distinguished from the straight vegetable oils (SVO) or waste vegetable oils (WVO) used as fuels in some modified diesel vehicles.

Comprehensive study by the Department of Agriculture - Philippine Coconut Authority on Coco-Biodiesel.

Read more articles on soaps: History, Usage and Processing.