Transportation, automobile, information technology service provider businesses are developing at rocket pace. Accordingly energy requirement for this industries is also increasing vertically. Petro-fuels are having limited reserves and can not fulfill the requirement of all. There is a need to search for alternative. Biodiesel is one of the most preferred alternative of fossil fuels. This work is a compilation of the information collected from various sources giving due credits to all. It explains the need of alternative fuels, details of biodiesel, different approaches to produce the same,...