Sumatra contains some of the largest tracts of intact rainforest left in the world, but it's at the center of a complicated web of deforestation drivers, many of which began during the Dutch colonial era and are now spurred further by corruption and the global demand for cheap palm oil used in a wide range of consumer products.

To understand the rapid expansion of industrial-scale agribusinesses that market both palm oil and pulp & paper to the global market from this, the largest island in the Indonesian Archipelago, podcast host Mike DiGirolamo speaks with Nur “Yaya” Hidayati and Philip Jacobson.

Hidayati is the national executive director of Walhi, the largest and oldest environmental advocacy NGO in Indonesia, while Jacobson is a contributing editor at Mongabay who has been covering Indonesia for six years.

They discuss what causes the massive deforestation in Sumatra in particular and Indonesia in general, why it’s so difficult to control, what exacerbates efforts to stop it, and what can be done globally and locally to slow or stop the expansion of continued land exploitation.

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