Deforestation in the Brazilian Amazon fell to its lowest level in eight years during the most recent monitoring period, according to new data from the Brazilian Human and Environment Amazon Institute, or Imazon, offering a major environmental milestone while underscoring the continuing vulnerability of the world’s largest rainforest. Between August 2025 and March 2026, approximately 1,460 square kilometers of Amazon rainforest were cleared, representing a 36 percent decrease compared to the same period one year earlier. According to Imazon, the figure marked the smallest area destroyed during the period since 2017.
The decline stretched across most of the Amazon biome, which spans portions of nine Brazilian states, with some of the largest reductions occurring in regions historically associated with industrial-scale deforestation. Pará, one of the states most heavily affected by Amazon forest clearing, recorded a 52 percent decline, representing 467 fewer square kilometers of destruction than the previous year. Mato Grosso, Brazil’s leading soybean-producing state, saw a 38 percent reduction, or 163 fewer square kilometers cleared. The state of Amazonas, located in the center of the rainforest, also experienced a notable decline, with forest clearing falling from 335 square kilometers during the previous monitoring period to 219 square kilometers this year.
Researchers and environmental advocates said the numbers reflected the impact of stronger environmental oversight, expanded enforcement operations, and policies implemented under Brazil’s Environment Ministry. Paulo Brando, a researcher and associate professor at the Yale School of the Environment, said the decline suggested that government action was beginning to have measurable effects on the ground.
“In general, when you see not only a pattern, but a trend in reducing deforestation, it means that sort of the actions taken by the government usually are in the right direction,” Brando said.
Environmental groups pointed specifically to efforts led by Environment Minister Marina Silva, including the restoration and strengthening of the First Action Plan for the Control of the Environment in the Amazon, improved fire management strategies, and reinforced enforcement operations involving Ibama, Brazil’s environment and renewables institute. Ana Clis Ferreira, a spokesperson for Greenpeace Brazil, said the decline represented encouraging progress, but warned that Amazon protections remain politically fragile and historically susceptible to reversal.
“History shows us that this decrease can be fragile, and that destruction occurs quicker than protection,” Clis Ferreira said. “We are in an election year and the dynamics of deforestation are highly sensitive to variations in enforcement and to the political context. In addition, Congress has been a threat to environmental protection.”
The recent reductions stand in stark contrast to the early years of former President Jair Bolsonaro’s administration, when Amazon deforestation surged dramatically. In 2019, the first year of Bolsonaro’s term, deforestation reached the highest levels recorded since satellite tracking became available. Since 2020, however, annual deforestation rates in the biome have generally declined, reflecting shifting enforcement priorities and renewed international scrutiny over Brazil’s environmental policies.
Imazon’s report also showed that the first quarter of 2026 ended with a 17 percent decrease in deforestation compared to the same January-to-March period one year earlier. Forest clearing fell from 419 square kilometers during the first quarter of 2025 to 348 square kilometers this year, a reduction researchers said was equivalent to roughly 7,000 football fields. Despite those broader improvements, however, researchers cautioned that several warning signs remain visible across the region and could threaten the durability of the recent progress.
March 2026 alone recorded a 17 percent increase in deforestation compared to March 2025, rising from 167 square kilometers to 196 square kilometers. Larissa Amorim, a researcher at Imazon, said the increase demonstrated the need for governments to intensify enforcement efforts against illegal logging and land clearing while simultaneously expanding sustainable economic opportunities for local communities.
“This specific increase serves as a warning for governments to further intensify their actions to combat illegal logging, with monitoring and punishment of those responsible. Furthermore, it is also important to strengthen bioeconomy initiatives and income generation with the forest standing, as well as allocating areas with undefined uses for conservation,” Amorim said.
The report identified Roraima as the only Amazonian state to register increased deforestation during the monitored period. Forest loss there rose 21 percent, climbing from 184 square kilometers during the previous period to 222 square kilometers this year. Researchers linked the increase partly to the state’s drier climate conditions, which favor activities that damage the rainforest, including logging and fires. Roraima also led the region in fire outbreaks during the opening months of 2026. According to Brazil’s space agency, INPE, seven of the 10 municipalities with the highest number of fire outbreaks between January and April were located in the state.
Caracaraí, a municipality in Roraima, recorded the largest amount of deforestation in the country during the monitored period, with more than 84 square kilometers of forest cleared. More than one-quarter of all fires in the state occurred in Caracaraí, which has been under federal police investigation for illegal fires, according to CNN Brazil. Across the Amazon biome as a whole, wildfires increased by roughly one-third during the first months of 2026 despite the overall slowdown in deforestation, highlighting the increasingly complex relationship between climate conditions, land clearing, and environmental degradation.
Researchers also found that conservation areas remained vulnerable to illegal clearing despite their protected status. The Triunfo do Xingu Environmental Protection Area in Pará lost more than 35 square kilometers of forest during the monitoring period, making it the most heavily deforested conservation unit identified in the report. The area accounted for more than 95 percent of deforestation within the municipality of São Félix do Xingu, one of the five municipalities most affected by forest clearing.
According to Imazon researcher Manoela Athaide, the concentration of destruction in specific territories underscores the need for more targeted monitoring and enforcement strategies capable of focusing resources on the most pressured regions before destruction accelerates further.
“The observed dynamics indicate that it is essential to prioritize efforts in these most pressured locations, with continuous monitoring strategies to contain the advance of deforestation,” Athaide said.
The report also showed significant improvements in forest degradation, a separate measure tracking partial damage to forests caused by logging and fires even when vegetation is not completely removed. Forest degradation in March 2026 totaled 11 square kilometers, representing a 95 percent reduction compared to March 2025 and the lowest level recorded for the month in more than a decade. Researchers stressed that degradation can still severely weaken forest ecosystems by reducing biodiversity and increasing vulnerability to climate change and future deforestation even when forests remain standing.
Raissa Ferreira, a researcher at Imazon, said the decline followed an unusually severe period in which degradation reached record levels during the previous annual cycle, making the improvement noteworthy but also emphasizing the need for sustained vigilance.
“The drop in degradation rates represents a significant sign of improvement, but it occurs after a critical period: from August 2024 to July 2025, we recorded the highest level ever observed in the historical series. This scenario reinforces the need for continuous vigilance to prevent peaks like this from recurring and further compromising the integrity of the forest,” Ferreira said.
Scientists emphasized that while the reduction in deforestation represents meaningful progress, the current pace of destruction remains environmentally dangerous if sustained over the long term. Stephen Porder, a professor of ecology at Brown University, warned that even reduced levels of clearing would eventually devastate the rainforest if deforestation is not brought close to zero.
“We have to be aware that moving from cutting the size of Connecticut every year to cutting the size of my home state of Rhode Island every year is progress, but it’s still going to mow down the rest of the forest eventually,” Porder said.
Researchers also highlighted the growing importance of satellite monitoring systems that allow scientists and regulators to track illegal clearing in near real time. Imazon’s satellite-based monitoring system, first developed in 2008, identifies deforested areas through satellite imagery and has become a key enforcement tool for understanding where destruction is occurring and how quickly it is spreading.
From a scientific perspective, Brando said transparency and accurate monitoring remain essential for any long-term strategy aimed at protecting the rainforest and shaping effective public policy.
“I’m not going to claim that I have the solution to reduce deforestation here, because it’s such a multifaceted issue,” Brando said. “But it depends on the transparency. You can know the size of the problem and then you build the policies from there.”
Environmental groups warned that the coming months remain critical because Amazon deforestation historically accelerates during the second half of the year, when dry season conditions make forest access easier and facilitate illegal clearing operations. Even so, researchers said the current trajectory could place the Amazon on track for one of its lowest annual deforestation totals in years if enforcement remains strong and current trends continue.
“If patterns from the last year hold,” Clis Ferreira said, “the scenario points to a possible historic reduction in the annual deforestation rate in the Amazon.”
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