The jatropha puzzle has finally been solved.

In 2005-06, most of the districts in the State were abuzz with the talk of jatropha. In press conferences, the then District Collectors, especially in those adjoining western and eastern ghats, talked of largescale jatropa plantations as the oil extracted from its seeds (blended with diesel up to 20 per cent) could be used as a substitute to petroleum diesel.