please go to the most recent contribution of mine on this subject matter available on Researchgate:
Critical Elements for Green Technologies – A critical review
Supplements to the presentation Critical Elements for Green Technologies – A critical review https://www.researchgate.net/publication/328278303_Critical_elements_for_green_technologies_-_A_critical_review
It is available as powerpoint presentation and a word document for explanation.
Jatropha oil is an alternative fuel and is produced from the seeds of the Jatropha curcas . It is also known as bio-diesel plant. It grows in open exposed areas, grasslands, wastelands, washed out mountain terrains etc. The Indian Railways use these oil after blending with diesel fuel and is a great success.