Global oil palm deforestation declines after zero-deforestation commitments
This study utilizes high-resolution global mapping to demonstrate that while zero-deforestation commitments have significantly reduced the rate of oil palm-driven forest loss since 2015, they have not completely eliminated deforestation, which remains concentrated in Southeast Asia and is primarily driven by industrial plantations.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
Tropical forests are the planet's most vibrant libraries of life, holding a vast array of species and acting as massive carbon sinks that help regulate the global climate. For decades, these ancient woodlands have been cleared to make way for agriculture, with one crop in particular driving a significant portion of this loss: the oil palm. This tree, native to West Africa but now cultivated extensively in Southeast Asia, produces a versatile vegetable oil found in everything from chocolate to shampoo. As demand for this oil grew, vast tracts of forest were converted into monoculture plantations, raising alarms among conservationists and governments alike. In response, a wave of corporate promises emerged, known as zero-deforestation commitments. These are pledges made by major companies to stop buying palm oil that comes from land cleared after a specific date, aiming to break the link between the product on supermarket shelves and the destruction of the forest.
For years, it remained unclear whether these high-profile promises actually worked. Did the industry truly slow down its destruction of old-growth forests, or did the clearing simply move to new, less visible places? To answer this, a team of researchers from institutions including the University of Antwerp and The TreeMap has produced the most detailed global picture yet of where and when oil palm plantations replaced ancient forests. By combining advanced satellite technology with careful human observation, they mapped the entire tropical world to see exactly how much forest was lost to oil palm before and after the turning point of 2015. Their work reveals a story of significant progress, showing that the rate of forest loss has dropped dramatically, though the problem has not vanished entirely.
The researchers built a high-resolution map that distinguishes between massive industrial plantations and smaller, family-run farms, tracking the history of the land beneath them. They focused specifically on old-growth evergreen forests, which are the complex, mature ecosystems that take centuries to develop, rather than younger regrowth or other types of trees. Using data from satellites that can see through cloud cover, they identified where these forests stood in the year 2000 and then watched for the moment they disappeared to make way for oil palm. This method allowed them to separate the signal of new planting from the noise of replanting existing crops, providing a clear timeline of expansion from 2001 through 2024.
The results show a sharp and encouraging decline in forest loss following the adoption of zero-deforestation policies. Between 2001 and 2015, the global rate of forest conversion to oil palm was high, with hundreds of thousands of hectares lost every year. However, from 2016 to 2024, that annual rate fell by roughly three-quarters. In the earlier period, oil palm was responsible for more than twelve percent of all tropical forest loss, but in the years since the commitments took hold, that share dropped to just over two percent. This suggests that the supply-chain interventions and corporate pledges have successfully reduced the direct replacement of ancient forests with palm oil plantations, even as the global price of palm oil has risen.
Despite this global success, the picture is not uniform across the world. The vast majority of the remaining forest loss is still concentrated in Indonesia and Malaysia, the two largest producers of palm oil, which together account for nearly all of the deforestation linked to the crop. Within these countries, the islands of Sumatra and Borneo, along with Peninsular Malaysia, remain the primary hotspots. While the rate of loss has slowed significantly in these regions compared to the past, the sheer scale of the industry means they still contribute the most to the total area lost. Outside of Southeast Asia, the situation is different. In Africa and South America, the amount of old-growth forest being cleared for oil palm is much smaller, though it has not disappeared. In some African nations, the expansion is driven more by small-scale farmers than by large industrial estates, and in a few specific cases, such as in Cameroon, there have been recent spikes in clearing that warrant close monitoring.
The study also highlights a crucial distinction between the types of plantations driving this loss. Industrial plantations, which are large and organized, have been responsible for the majority of the forest conversion, replacing roughly three to five times more forest than smallholder farms over the last two decades. The researchers found that while the overall trend is positive, smallholder farmers who are not part of formal supply chains or certification schemes may still be clearing forests, particularly in areas where oversight is weak. This includes some protected areas in Indonesia and specific regions in Africa where artisanal mills are proliferating. The data indicates that while the big players have largely heeded the call to stop clearing new forests, the smaller, more fragmented operations remain a challenge to monitor and regulate.
One of the most significant contributions of this work is the sheer precision of the new map. The researchers improved their detection methods to such a degree that they could identify oil palm plantations with a much higher degree of accuracy than previous attempts. This allowed them to correct for errors where small farms were missed or where the timing of forest loss was unclear. They found that their new map covers a larger area than earlier versions, capturing more of the true extent of the industry, including young plantations that were previously invisible to satellite sensors. This improved accuracy gives a more reliable baseline for future monitoring, ensuring that when companies claim they are sourcing deforestation-free oil, there is a robust, independent way to verify those claims.
Ultimately, the study confirms that the era of unchecked forest conversion for palm oil in the tropics has passed. The sharp decline in deforestation rates after 2015 suggests that policy and corporate action can effectively alter the trajectory of an entire industry. However, the researchers caution that the job is not finished. The remaining forest loss, though smaller, is still happening in critical biodiversity hotspots, and the indirect effects of expansion, such as road building and land speculation, continue to threaten these ecosystems. The map serves as a powerful tool for accountability, showing that while the industry has taken a major step back from the brink, the pressure to protect the remaining ancient forests requires continued vigilance and inclusive support for all farmers, regardless of their size.
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