Have you heard of a sustainable plant that produces fuel as well as homeopathic medicines? Or a revolutionary process that turns garbage or plants into fuel?

"Let's start with jatropha," says German businessman Hans Henning-Judek, close to his office in Yokohama's Bashimichi. "I call it a miracle plant."

Native to the tropics, jatropha produces fruit year round while managing to improve the soil in which it is growing, rather than degrade it. Used for years for medical properties, its seeds are now being utilized as a biofuel.