CALOTROPIS PROCERA
Calotropis procera carried in arid and semi arid lands which occupy one third of the earth's surface. Indian arid zone occupies an area of about 0.3 million sq. km. 90% of which about 270,000 sq. km. is confined to north west Indian covering most of Western Rajasthan, part of Gujarat and small portions of Punjab and Haryana. India with its vast expanse of wasteland unsuitable for agricultural production (nearly 180 million ha) could be considered for economically viable production of biofuels.