Deforestation

Deforestation is the large-scale clearing or removal of forest, most often to convert the land to farming, grazing, logging, mining, or urban development. It differs from forest degradation, in which a forest remains standing but is thinned or damaged, because deforestation removes the tree cover itself and, with it, most of the forest’s original ecological function.

Scale of global deforestation

Satellite monitoring now tracks forest loss in close to real time. Data from the University of Maryland’s GLAD lab, distributed through the World Resources Institute’s Global Forest Watch platform, showed the world lost 4.3 million hectares of tropical primary rainforest in 2025, an area roughly the size of Denmark. That figure marked a 36 percent drop from a record high the year before, but WRI noted the 2025 loss was still 46 percent higher than a decade earlier, underscoring that a single year’s improvement does not reverse a longer upward trend. Fires accounted for 42 percent of all tree cover loss worldwide in 2025, a sharp jump from fire’s historical share, while agricultural expansion remained, in WRI’s words, the leading driver of tree cover loss overall.

Primary drivers

Commercial agriculture, including cattle ranching and plantations for crops such as soy and palm oil, clears more tropical forest than any other activity. Smallholder subsistence farming, logging for timber and paper, mining, and infrastructure projects such as roads and dams add further pressure, often by opening up previously inaccessible forest to the other drivers that follow behind them. Fire, whether deliberately set to clear land or escaping from nearby agricultural burns during drought, has become an increasingly large and increasingly unpredictable contributor, since a warming, drying climate makes forests that were once too wet to burn more flammable in a given year.

Ecological and climate effects

Forests hold a disproportionate share of the planet’s terrestrial biodiversity, so clearing them is a leading driver of habitat loss and species decline, particularly in tropical regions such as the Amazon Basin, the Congo Basin, and the forests of Borneo and Sumatra. Trees also store carbon captured from the atmosphere over decades or centuries, and when forest is cleared and burned, much of that stored carbon returns to the atmosphere as carbon dioxide, adding to the greenhouse effect rather than helping offset it. Beyond carbon, forests regulate local and regional rainfall patterns by cycling moisture back into the atmosphere, so large-scale clearing can measurably reduce rainfall even in areas some distance from the cleared land, and the loss of root systems that once held soil in place leaves slopes and riverbanks far more vulnerable to erosion.

Deforestation in major forest regions

The Amazon Basin, spread across Brazil and eight neighboring countries, holds the largest contiguous tropical rainforest on Earth and has also recorded the largest absolute forest losses of any region for decades, driven mainly by cattle ranching and soy cultivation along an expanding agricultural frontier. The Congo Basin in Central Africa, home to the world’s second-largest rainforest, has historically lost forest more slowly, largely because it has less developed road and agricultural infrastructure, though smallholder clearing for subsistence farming and fuelwood remains a steady, widespread pressure across the region. In Southeast Asia, the forests of Borneo and Sumatra have been reshaped heavily by palm oil and pulpwood plantations, with peatland forests in the region especially significant because draining and clearing them releases carbon that had been locked away for thousands of years, not just the carbon stored in the trees themselves. Each region illustrates that the dominant driver of deforestation varies by local economy and geography even though the underlying trade-off, forest versus agricultural or commercial land, repeats worldwide.

Human and economic dimensions

Deforestation frequently displaces or disrupts Indigenous and local communities whose livelihoods depend on standing forest for food, medicine, and cultural practices, and conflicts over land rights often intensify as commercial interests push into previously forested frontier areas. At the same time, the economic pressures driving deforestation are real: agricultural expansion can raise incomes and food production in the near term, which is part of why reducing deforestation usually requires offering viable alternatives rather than enforcement alone.

Responses and monitoring

Efforts to slow deforestation include protected areas and reserves that place land off-limits to clearing, certification schemes meant to keep deforestation-linked commodities out of supply chains, and international programs such as REDD+, which pays countries or landowners to keep forest standing rather than clear it, treating avoided deforestation as a measurable climate benefit. Reforestation and large-scale tree-planting programs aim to restore cleared land, though a newly planted forest typically takes decades to approach the ecological complexity and carbon storage of the old-growth forest it replaced. Satellite-based monitoring, including the Global Forest Watch system that produces the annual loss estimates cited above, has made it far easier to detect clearing as it happens rather than relying on infrequent ground surveys, which has in turn strengthened enforcement and corporate supply-chain accountability.

FAQs

Is deforestation reversible? Forest cover can be replanted, but a regrown forest generally takes many decades to approach the biodiversity, soil structure, and carbon storage of the old-growth forest that was cleared, so reforestation is better understood as a long-term partial recovery than a quick reversal.

What is the difference between deforestation and forest degradation? Deforestation removes the tree cover entirely and converts the land to another use, while forest degradation leaves trees standing but reduces the forest’s ecological quality, for example through selective logging, fragmentation, or persistent disturbance that reduces the density and diversity of species the forest can support without eliminating the canopy outright.

Editorially reviewed by Specialty Digest Editorial TeamLast reviewed November 1, 2026Researched and drafted with AI assistanceReport an issue