How the humble coconut is starting to fuel parts of Papua New Guinea

Coconut biodiesel made on Karkar Island, Papua New Guinea, is used as an alternative to traditional fuels. Photograph: Kulili Estates

On Karkar island in Papua New Guinea, hundreds of coconut trees stand tall, stretching far into the distance.

Decades ago, the fruit was a lucrative export but over the years it has become less prized on international markets. Now, the small island off the north coast of the country, is putting coconuts to another use.