Availability of energy at a genuine cost is of importance of economic development of every nation. People thought the hardy Jatropha tree is the answer to the food vs. fuel debate in the third world countries. The book is contain the complete information on cytology, floral biology, seed morphometrics and oil content deal with the proper cultivation and hybridization programs and energy crunch as a long term perspective plan. It is not a panacea for the future energy requirement of the world but, it will be a beam of light for the future research and developmental programmers.