The tamanu tree [Calophyllum inophyllum] has been helping humans out since prehistoric times. Now, the fragrant, deep brown oil may yet serve another purpose: bioenergy. A mature tamanu grove can yield up to 20 tons of crude oil per hectare each year. In the Wonogiri district of Central Java, Indonesia, a new study shows that cultivating tamanu for bioenergy on degraded land can achieve multiple benefits for farmers while restoring the land, as well as helping to reduce the country’s reliance on fossil fuels.

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