You've probably heard that deforestation is bad. But the numbers behind it are staggering in ways that statistics alone can't capture. Here are ten facts that show the real scale of what's happening to the world's forests right now.
Key points
- An estimated 42 million trees are cut down every single day worldwide
- The world has lost nearly half its original forest cover since humans began clearing land
- Deforestation accounts for up to 20% of global greenhouse gas emissions
- Current extinction rates are roughly 1,000 times faster than natural background rates, driven largely by habitat loss
1. We cut down 42 million trees every day
That's roughly 15 billion trees per year, according to a comprehensive 2015 study published in Nature.1 To put that in perspective: by the time you finish reading this sentence, about 200 more trees will have been cut down.
The pace isn't slowing down fast enough. While deforestation rates have declined since the 1990s, losses remain catastrophically high in tropical regions where biodiversity and carbon storage are concentrated.
2. We've already lost nearly half the world's forests
There were an estimated 5.6 trillion trees on Earth before humans started clearing land for agriculture. Today, about 3 trillion remain.1 That's a 46% decline from the starting point.
The 4.14 billion hectares of forest that still cover the planet represent 32% of total land area, according to FAO's 2025 assessment.3 But nearly half a billion hectares have been lost to deforestation since 1990 alone — an area larger than India.
3. Deforestation releases more emissions than all cars and trucks combined
Tropical deforestation alone releases more than 5.6 billion tonnes of greenhouse gases every year, according to UNEP.4 That's equivalent to the annual emissions of about 1.2 billion cars.
Some estimates put deforestation's share of global emissions between 12% and 20%.5 For context, all the cars, trucks and buses in the world account for about 11% of global CO₂ emissions. When you cut down a forest, you don't just lose a carbon sink — you turn it into a carbon source.
Learn more about the effects of deforestation on climate change.
4. Forests hold 80% of all land-based species
Forest ecosystems are home to about 80% of terrestrial biodiversity, including mammals, birds, insects and plants.6 When a forest is cleared, those species don't just move somewhere else. Most of them disappear.
The IUCN Red List reports that at least 16,425 of the 47,282 assessed tree species are threatened with extinction.7 That's more than one in three tree species at risk. And that's just the trees — it doesn't count the animals, fungi and insects that depend on them.
5. We're in the sixth mass extinction, and deforestation is a leading driver
Current extinction rates are estimated to be roughly 1,000 times faster than natural background rates.8 Scientists call this the sixth mass extinction, and unlike the previous five, this one is caused by humans.
Habitat destruction — primarily through deforestation — is the single largest threat to species survival. The IPBES warned in 2019 that around one million species face extinction risk this century if current trends continue, and much of that risk comes from clearing forests for agriculture.
What does "1,000 times faster" mean? Natural extinction rates are measured in "background extinctions per million species-years." Before humans, that rate was about 0.1 to 1 extinction per million species per year. Today, it's estimated at 100 to 1,000 per million species-years. The difference is the human footprint, and deforestation is a major part of it.
6. The Amazon rainforest has turned into a carbon source in some regions
Parts of the Amazon now emit more carbon than they absorb. A study found that the eastern Amazon released about one billion tonnes of carbon dioxide per year, making it a net carbon source instead of a sink.9
The cause? Deforestation and degradation from fires, logging and agriculture. When you clear enough trees, the remaining forest dries out, becomes more flammable and loses its ability to store carbon. The feedback loop accelerates.
Read the full story in our Amazon rainforest deforestation overview.
7. Deforestation warms the climate even beyond the carbon
Clearing forests doesn't just release stored carbon. It also changes local and regional climate. A 2022 study found that deforestation-induced warming and drying cause an additional 5% loss of aboveground biomass in the Amazon — a feedback effect that most carbon accounting misses.10
Forests regulate temperature through evapotranspiration. When you replace a rainforest with pasture, the land heats up. Models suggest that complete global deforestation could cause an additional 0.8°C of warming after 100 years, on top of warming from the carbon release.11
8. The world loses 10 million hectares of forest every year
That's the annual net forest loss globally, according to UNEP.4 For comparison, that's an area about the size of South Korea disappearing every single year.
Gross deforestation — the permanent conversion of forest to other land uses — was 10.9 million hectares per year between 2015 and 2025, according to FAO.3 Net loss is slightly lower because some areas are replanted, but ecologically, a tree plantation is not the same as an old-growth forest.
See the full breakdown in our deforestation statistics page.
9. Agriculture drives the vast majority of deforestation
Agriculture is responsible for transforming forests into farmland at a massive scale. One analysis found that 34% of cleared forests in Latin America and Africa became soy plantations and cattle pastures.2
Beef production is the single largest driver, especially in the Amazon. Palm oil is the dominant driver in Southeast Asia. Soy expansion drives clearing in the Cerrado. The crops and livestock change, but the pattern is the same: forests cleared for food and commodity production.
Explore the drivers in depth: what is causing deforestation.
10. Protected areas prevent a third of tropical deforestation emissions
Here's a fact that shows what's possible: tropical protected areas reduced deforestation carbon emissions by one third between 2000 and 2012, according to a study published in Nature Communications.12
When forests are protected and enforcement works, deforestation drops. Brazil's recent record low — 3,335 square kilometres in the year ending July 2026 — proves that political will and satellite monitoring can reverse the trend.
The question is whether that will lasts. And whether it spreads to other countries before it's too late.
See what can be done: deforestation solutions that work.
The numbers are real. The damage is reversible. The choice is ours.
These ten facts show the scale of deforestation: 42 million trees a day, half the world's forests already gone, extinction rates 1,000 times above normal, and up to 20% of global emissions from forest loss.
But they also show what's possible. Protected areas work. Enforcement works. When governments choose to act, deforestation falls. Brazil proved it in 2026. The Amazon can recover. Forests can regrow. Species can be saved.
The facts are shocking. The trajectory is not fixed.
Watch the film to see what's at stake. Then choose how the story ends.
Questions people ask
How many trees are cut down every day?
Approximately 42 million trees are cut down every day worldwide, based on the estimate of 15 billion trees lost per year from a 2015 Nature study.1 This figure is derived from forest area loss and average tree density, not a direct count, so it should be understood as an order-of-magnitude estimate.
What percentage of global emissions comes from deforestation?
Deforestation accounts for 12% to 20% of global greenhouse gas emissions, according to various estimates.5 Tropical deforestation alone releases more than 5.6 billion tonnes of greenhouse gases annually.4 This makes forest loss one of the largest sources of emissions, comparable to entire economic sectors.
How much forest has the world lost?
Why is deforestation causing species extinction?
Forests hold about 80% of terrestrial biodiversity.6 When forests are cleared, species lose their habitat, food sources and breeding grounds. Current extinction rates are roughly 1,000 times faster than natural background rates, and habitat destruction through deforestation is the leading driver.8 At least 16,425 tree species are now threatened with extinction.7
Can deforestation be stopped?
Yes. Brazil reduced Amazon deforestation by 42% in one year, bringing it to the lowest level since 1988. Protected areas have prevented one third of tropical deforestation emissions.12 When there's enforcement, satellite monitoring and political will, deforestation falls. The challenge is maintaining that will and scaling it globally. Learn more about solutions that work.
Sources
- Crowther, T.W., Glick, H.B., Covey, K.R., et al. (2015). Mapping tree density at a global scale. Nature, 525, 201–205. Accessed 22 October 2026.
- TheRoundup (2026). How Many Trees are Cut Down Every Day? [2026]. Accessed 22 October 2026.
- Food and Agriculture Organization (2025). Global Forest Resources Assessment 2025: Key findings. FAO, Rome. Accessed 22 October 2026.
- United Nations Environment Programme (2026). How halting deforestation can help counter the climate crisis. Accessed 22 October 2026.
- Climate Impact (2026). The Effects & Impacts of Deforestation. Accessed 22 October 2026.
- Science Times (2025). Deforestation and Biodiversity Loss: How Habitat Destruction Is Disrupting Ecosystem Balance. 24 December 2025. Accessed 22 October 2026.
- World Animal Foundation (2026). Deforestation Statistics You Need To Know In 2026. Accessed 22 October 2026.
- International Fund for Animal Welfare (2026). 21 animals that recently went extinct (Updated For 2026). Accessed 22 October 2026.
- EOS Data Analytics (2026). Deforestation & Greenhouse Gases: Impact On Global Warming. Accessed 22 October 2026.
- Gatti, L.V., Cunha, A.P., Marani, L., et al. (2022). Deforestation-induced climate change reduces carbon storage in remaining tropical forests. Nature Communications, 13, 1964. Accessed 22 October 2026.
- Swann, A.L., Fung, I.Y., Liu, Y., et al. (2014). Impact on short-lived climate forcers increases projected warming due to deforestation. Nature Climate Change, 4, 926–930. Accessed 22 October 2026.
- Scharlemann, J.P.W., Kapos, V., Campbell, A., et al. (2010). Tropical protected areas reduced deforestation carbon emissions by one third from 2000–2012. Nature Communications. Accessed 22 October 2026.