Tropical Primary Rainforest Loss Decreases by 36 Percent Globally in 2025
Data released by the World Resources Institute (WRI) and the University of Maryland shows that the world lost 4.3 million hectares of tropical primary rainforest last year. This represents a 36 percent decrease compared to the record highs of 2024. While researchers noted an easing in forest loss, they emphasized that current rates remain significantly above the levels needed to meet global climate goals.
Key Facts
- Entity / WRI & UMD : Published forest loss data
- Metric / Forest Loss : 4.3 million hectares lost last year
- Trend / Comparison : 36% decrease from 2024 record
- Target / Climate : Rates still exceed goals for 1.5C limit
Primary rainforests are considered the most biologically diverse and carbon-dense ecosystems on the planet. Their loss is irreversible in human timescales. The 2025 data marks a significant departure from the previous year's trend, which saw record-breaking deforestation in several basins. The decrease is largely attributed to policy shifts in major forested nations like Brazil and Indonesia, where stricter enforcement against illegal logging and improved monitoring systems have been implemented.
Despite the overall reduction, the absolute loss of 4.3 million hectares—an area roughly the size of Switzerland—remains alarming for climate scientists. The carbon emissions released from this loss continue to impede international efforts to limit global warming to 1.5 degrees Celsius. The report also highlighted that while primary forest loss eased, other forms of forest degradation, such as those caused by wildfires and fragmented agriculture, continue to rise in temperate and boreal regions, complicating the global carbon sink capacity.
| Year | Primary Forest Loss (Hectares) | Percentage Change |
|---|---|---|
| 2024 | ~6.7 Million | Baseline (High) |
| 2025 | 4.3 Million | -36% |
Glossary
Primary Forest: Mature, natural forests that have remained relatively undisturbed by human activity.
Carbon Sink: A forest, ocean, or other natural environment viewed in terms of its ability to absorb carbon dioxide from the atmosphere.
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