New Study Warns Amazon May Be Losing Its Power to Fight Climate Change

A sweeping new study published Thursday in the journal Nature Climate Science has found that large sections of the Amazon rainforest are now emitting more carbon dioxide than they absorb, a troubling reversal that scientists say could significantly accelerate global warming. Researchers analyzed satellite data and ground-level measurements collected over two decades, concluding that rampant deforestation combined with increasingly severe droughts has pushed roughly 17 percent of the Amazon beyond its natural ability to recover.

The Amazon has long been celebrated as the planet's most powerful carbon sink — a vast green engine that draws billions of tons of CO₂ out of the atmosphere each year and stores it within its trees and soil. However, the new findings suggest that continued land clearing for agriculture and cattle ranching, along with record-high temperatures driven by climate change, have severely weakened the forest's ecological resilience. In the most affected areas of the eastern Amazon, researchers measured carbon emissions nearly three times higher than the regional average recorded just ten years ago.

The implications for global climate goals are profound. Scientists warn that if current trends continue, the Amazon could reach a tipping point within the next two to three decades, triggering a self-reinforcing cycle in which a drier, degraded forest releases even more carbon, further warming the climate and causing additional forest loss. "We are witnessing the early stages of a feedback loop that our models consistently flagged as catastrophic," said Dr. Luciana Ferreira, a lead author of the study and forest ecologist at Brazil's National Institute for Amazon Research.

Conservation groups and several governments are calling for immediate action, urging policymakers to put an end to illegal logging and to fund large-scale reforestation efforts across degraded zones. Brazil's environment ministry acknowledged the report's findings and pledged to accelerate enforcement of existing protections, while international climate negotiators pointed to the study as fresh evidence that preserving intact forests must be treated as urgently as reducing industrial emissions. Experts agree that without bold intervention, one of Earth's most irreplaceable ecosystems may cross a threshold from which there is no return.