Wikipedia points out that Jatropha curcas is easy to grow and convert into fuel:

The seeds contain 30% oil [8]that can be processed to produce a high-quality biodiesel fuel, usable in a standard diesel engine. […] Cultivation is uncomplicated. Jatropha curcas can grow in wastelands and grows almost anywhere, even on gravelly, sandy and saline soils. It can thrive on the poorest stony soil and grow in the crevices of rocks. Complete germination is achieved within 9 days.

Again biodiesel presents a major paradigm shift for islands and other remote areas in need of a fuel source.

Oil content varies from 28% to 30% and 94% extraction, one hectare of plantation will give 1.6t (metric tonne) of oil if the soil is average.

This plant is unfit for human consumption as food, requires no pesticides, and it grows even in the desert.