People clear forests primarily to make money from the land beneath them. About 27% of global forest loss comes from permanent conversion to produce commodities like beef, soy, and palm oil. Another 26% is driven by forestry operations, 24% by rotating agricultural practices, and 23% by wildfire. The world loses roughly 10 million hectares of forest every year, though about half of that is offset by regrowing forests, leaving a net loss of around 5 million hectares annually.
Agriculture Is the Biggest Driver
Across the tropics, where the most destructive deforestation happens, agriculture dominates. Pasture expansion for cattle ranching is the single largest cause, responsible for about half of all tropical forest cleared for farming. Ranchers, particularly in South America, burn or bulldoze forest to create grazing land because beef commands strong prices on domestic and international markets. Oil palm and soy cultivation together account for at least another fifth of tropical agricultural deforestation. Six more crops fill in much of the rest: rubber, cocoa, coffee, rice, maize, and cassava, with their importance varying by region.
These aren’t just small farmers feeding their families. Large-scale commercial operations play a growing role. In Peru, for example, the government long claimed that 90% of Amazon deforestation was caused by small migrant farmers practicing subsistence agriculture. But recent research shows industrial monoculture plantations for oil palm and cacao, gold mining, and oil and gas extraction are increasingly significant drivers. The old narrative conveniently blamed poor farmers while underplaying the role of corporate land conversion.
That said, small-scale agriculture still matters. Shifting cultivation, where farmers rotate between active crop fields and patches of regenerating forest, accounts for about 24% of global forest loss. Many of these farmers aren’t permanently destroying forest. They clear a patch, farm it for a few seasons, then move on and let it regrow. The problem is that when population pressure or economic desperation shortens that recovery cycle, the forest never fully comes back.
How Economics and Land Laws Encourage Clearing
Deforestation rarely happens in a policy vacuum. Land tenure systems, meaning the rules governing who owns and controls land, shape how forests are treated. In Brazil, privatization of land that followed waves of colonization created a system where forests on private property are seen as underused assets. Brazil’s Forest Code requires private landowners in the Atlantic Forest to keep 20% of their property forested, but compliance is uneven. Some landowners have even learned to game restoration laws. The Atlantic Forest Law, passed in 2006, prohibits clearing forests older than 10 years. In response, some landowners deliberately cut down regrowing forest at the eight- to ten-year mark to preserve their legal right to use the land for other purposes and maintain its market value.
Where land tenure is weak or informal, the incentives get worse. Squatters can sometimes clear forest on public or loosely governed land and eventually obtain legal title to it, effectively rewarding deforestation with ownership. Meanwhile, Indigenous communities without formal tenure documents are often excluded from restoration funding programs, even though they may be the most effective forest stewards.
International commodity markets amplify all of this. When global demand for beef, soy, or palm oil rises, the economic payoff for clearing forest increases. Subsidies for agricultural production in some countries further tilt the calculation toward cutting trees.
Roads Open Forests to Destruction
Building a road through a forest is one of the most reliable predictors of future deforestation. A 2025 study published in Nature Communications found that within 1 kilometer of roads, forest cover drops by 18.6%, trees are 2.7 meters shorter on average, and the forest becomes significantly more fragmented. These effects extend up to 5 kilometers from the road, though they weaken with distance. Globally, road-linked forest loss totals about 4.26 million square kilometers, equivalent to nearly 11% of all forest that existed in 2020.
Roads do their damage in stages. First, construction crews clear a corridor. Then the road provides access for loggers, miners, ranchers, and settlers who would never have reached the interior forest otherwise. Selective logging operations often go in first, pulling out the most valuable trees. The damaged, thinned forest that remains is more vulnerable to fire and further clearing. Protected areas, in theory, should buffer against this, but the research found that existing protections have “insufficient capacity” to curb road-linked degradation. The severity of the damage depends heavily on governance. Countries with stronger environmental enforcement see less destruction near roads than countries where regulations exist on paper but aren’t applied.
Regional Differences in What Gets Cleared and Why
The Amazon and Southeast Asia illustrate how deforestation drivers vary by geography. In the Amazon, cattle ranching dominates. Ranchers clear vast stretches for pasture, often using fire. Soy farming has also expanded dramatically into previously forested areas, sometimes replacing pasture that was itself carved from jungle, pushing ranchers deeper into the frontier. In Southeast Asia, the primary drivers are conversion of forest to plantations (especially oil palm and rubber), shifting cultivation, logging, and fire. Indonesia alone has lost enormous forest areas to the fiber, oil palm, and mining industries.
These regional patterns matter because they determine what solutions might work. Reducing Amazon deforestation requires tackling the beef supply chain and land speculation. In Southeast Asia, the focus shifts to palm oil certification, plantation governance, and fire management.
The Scale of Damage
Between 2001 and 2024, the world lost a cumulative 520 million hectares of tree cover. In 2024 alone, 26 million hectares of natural forest disappeared globally. Fires accounted for a striking 45% of that year’s loss, or about 13 million hectares, making 2024 the worst year for fire-driven tree cover loss in the entire tracking period.
Agriculture, forestry, and other land use together account for roughly 21 to 22% of global greenhouse gas emissions. Deforestation contributes a significant share of that figure because trees store carbon that gets released when they’re burned or left to decompose. A single hectare of tropical forest can hold hundreds of tons of carbon. Multiply that by millions of hectares per year and the climate impact is enormous.
Disease Risks From Forest Clearing
Deforestation doesn’t just release carbon. It reshapes ecosystems in ways that increase the risk of infectious diseases jumping from animals to humans. When forest canopy is removed, the floor level loses its protection from direct sunlight and rainfall. Soil erodes and standing water pools form, creating ideal breeding habitat for mosquitoes. In Southeast Asia, this process has driven the expansion of zoonotic malaria: mosquito species that prefer sunlit pools thrive in deforested areas, and infected primates that once lived in the canopy are forced to ground level, closer to people.
Yellow fever followed a similar path. The virus originally circulated high in the forest canopy in a cycle between mosquitoes and monkeys. When trees were cut, that cycle moved to the forest floor where human infection became possible. Ebola outbreaks have been linked to habitat disruption that pushes bat species, the virus’s natural reservoir, into closer contact with human communities. Lyme disease transmission has increased as deforestation altered the movement patterns of white-tailed deer, the primary host for the ticks that carry the bacterium.
The pattern is consistent across diseases: removing forest layers eliminates habitat, forces wildlife into new areas including the edges of towns and farms, breeds more disease-carrying insects, and increases the frequency of human contact with animal pathogens that were previously contained deep in intact ecosystems.