GENEVA — The pace of global forest loss slowed measurably last year for the first time in more than a decade, driven by strengthened enforcement in the Brazilian Amazon and a recovery of temperate woodlands across parts of East Asia and central Europe, according to a comprehensive annual assessment released Tuesday by the World Forest Monitoring Consortium. Scientists accompanying the report warned, however, that the gains remain precarious and could be substantially reversed by intensifying El Nino drought and fire conditions forecast to peak across tropical forest zones later this year.
The consortium’s report, drawing on satellite radar and optical imagery processed across more than 130 countries, found that total primary forest loss in the most recent full measurement year reached approximately 9.4 million hectares — a reduction of roughly 14 percent from the prior year’s figure of 10.9 million hectares, and the lowest annual total recorded since the consortium adopted its current satellite-based methodology in 2014. Tropical primary forests, which contain the largest concentrations of above-ground carbon and the greatest density of plant and animal biodiversity, accounted for 6.1 million hectares of the total, down from 7.3 million the year before.
Brazil posted the steepest year-on-year reduction in deforestation of any major forest nation, with Amazon primary forest loss falling by more than 30 percent compared to the prior measurement period. Environmental enforcement agencies attributed the improvement to a combination of increased interception operations using real-time satellite alert systems, revised land tenure policies that removed certain ambiguities that had historically been exploited by illegal clearing operations, and strengthened cooperation between federal authorities and state-level agencies in frontier zones. Independent analysts said the headline figures are credible and consistent with field reports but cautioned that structural economic pressure on the forest — driven by global commodity prices for soy, beef, and timber — remains intense and would quickly reassert itself if enforcement resources were reduced.
Indonesia, the other country most prominently associated with large-scale tropical forest loss in global data series, also recorded a meaningful decline. Peatland conversion — regarded by atmospheric scientists as an especially severe form of forest loss because tropical peat stores vastly more carbon per hectare than surface vegetation — fell to its lowest level since the consortium began tracking it as a separate data category. Analysts said Indonesia’s sustained investment in fire management infrastructure since the catastrophic peat fire season of 2015, which produced smoke haze affecting tens of millions of people across Southeast Asia, has contributed substantially to the improvement. They noted, however, that the extensive drainage canal networks installed to facilitate peat conversion in previous decades remain in place across millions of hectares and continue to create structural fire vulnerability that no enforcement policy alone can fully address.
The report’s authors said the figures provide legitimate grounds for measured optimism but attached an explicit warning about conditions developing in the months ahead. An El Nino climate pattern that established itself across the Pacific over the past six months has already begun suppressing rainfall across key forest zones in Indonesian Borneo, Papua New Guinea, and the eastern and central Brazilian Amazon. Climate modellers working with the consortium project that if the event intensifies as current forecasts suggest through the southern hemisphere spring, fire season severity across these areas could be sufficient to erase a significant share of this year’s conservation gains within a period of weeks.
Dr. Ingrid Halvorsen, the consortium’s science director, said the interplay between El Nino events and tropical forest fire systems is well established in the scientific record and deeply concerning in the context of a long-term warming trend that is raising the baseline conditions under which every El Nino episode now unfolds. Each drought cycle, she said, now operates on top of ambient temperatures that are structurally higher than those that prevailed during comparable events two or three decades ago. That means vegetation reaches critical dryness faster, fire ignition thresholds are crossed earlier in each dry season, and the forest’s capacity to recover from repeated burning events is progressively diminished. She said the 2015 and 2019 El Nino episodes each produced sharp and statistically significant spikes in the global deforestation data that required two to three full years to normalise even after rainfall patterns returned to average levels.
Environmental advocacy organisations said the annual data release reinforces the case for integrating forest protection formally and verifiably into international climate finance mechanisms ahead of a major multilateral climate conference scheduled for late 2026. Campaign groups said that while individual country-level pledges on deforestation have been made at successive climate summits over the past decade, the absence of binding monitoring frameworks tied to those pledges has made it impossible to hold governments accountable to their stated commitments. They said satellite-derived data of the kind the consortium publishes provides precisely the independent verification infrastructure that treaty architects would need to make forest protection pledges enforceable rather than aspirational.
The consortium’s complete dataset, including country-level breakdowns, sub-national mapping data, and an interactive online tool allowing users to view forest-change patterns at regional scale, was made publicly available through the organisation’s open-data platform simultaneously with the release of the summary report.