Deforestation forest loss greatly exceeds that of other countries.
Deforestation is the conversion of forested areas to non-forested areas. The main sources of deforestation in the Amazon are human settlement and the development of the land. In 2022, about 20% of the Amazon rainforest has already been deforested and a further 6% was "highly degraded". Research suggests that upon reaching about 20–25% (hence 0–5% more), the
tipping point to flip it into a non-forest ecosystem – degraded
savannah – (in eastern, southern and central Amazonia) will be reached. This process of savanisation would take decades to take full effect. Farms established during the 1960s were based on crop cultivation and the
slash and burn method. However, the colonists were unable to manage their fields and the crops because of the loss of
soil fertility and weed invasion. The soils in the Amazon are productive for just a short period of time, so farmers are constantly moving to new areas and clearing more land. Deforestation is considerable, and areas cleared of forest are visible to the naked eye from outer space. In the 1970s, construction began on the
Trans-Amazonian highway. This highway represented a major threat to the Amazon rainforest. The highway still has not been completed, limiting the environmental damage. Between 1991 and 2000, the total area of forest lost in the Amazon rose from , with most of the lost forest becoming pasture for cattle. Seventy percent of formerly forested land in the Amazon, and 91% of land deforested since 1970, have been used for livestock
pasture. Currently, Brazil is the largest global producer of
soybeans. New research however, conducted by Leydimere Oliveira et al., has shown that the more rainforest is logged in the Amazon, the less precipitation reaches the area and so the lower the yield per hectare becomes. So despite the popular perception, there has been no economical advantage for Brazil from logging rainforest zones and converting these to pastoral fields. The needs of soy farmers have been used to justify many of the controversial transportation projects that are currently developing in the Amazon. The first two highways successfully opened up the rainforest and led to increased settlement and deforestation. The mean annual deforestation rate from 2000 to 2005 ( per year) was 18% higher than in the previous five years ( per year). Although deforestation declined significantly in the Brazilian Amazon between 2004 and 2014, there has been an increase to the present day. Brazil's former President, Jair Bolsonaro, supported the relaxation of regulations placed on agricultural land. He used his time in office to allow for more deforestation and more exploitation of the Amazon's rich natural resources. Deforestation reached a 15 year high in 2021. Since the discovery of
fossil fuel reservoirs in the Amazon rainforest, oil drilling activity has steadily increased, peaking in the Western Amazon in the 1970s and ushering another drilling boom in the 2000s. Oil companies have to set up their operations by opening new roads through the forests, which often contributes to deforestation in the region. 9.4% of the territory of the Amazon is affected by oil fields. Mining is also a major driver of deforestation. 17% of the area of the Amazon Rainforest is affected by mining. The
European Union–Mercosur free trade agreement, which would form one of the world's largest free trade areas, has been denounced by environmental activists and indigenous rights campaigners. The fear is that the deal could lead to more deforestation of the Amazon rainforest as it expands market access to Brazilian beef. According to a November 2021 report by Brazil's
INPE, based on
satellite data, deforestation has increased by 22% over 2020 and is at its highest level since 2006.
2019 fires There were 72,843 fires in Brazil in 2019, with more than half within the Amazon region. In August 2019 there were a record number of fires.
Deforestation in the Brazilian Amazon rose more than 88% in June 2019 compared with the same month in 2018. The increased area of fire-impacted forest coincided with a relaxation of environmental regulations from the Brazilian government. Notably, before those regulations were put in place in 2008 the fire-impacted area was also larger compared to the regulation period of 2009–2018. As these fire continue to move closer to the heart of the Amazon basin, their impact on biodiversity will only increase in scale, as the cumulative fire-impacted area is correlated with the number of species impacted. and there were indications that 2006 may have been a second successive year of drought. A 2006 article in the UK newspaper
The Independent reported the
Woods Hole Research Center results, showing that the forest in its present form could survive only three years of drought. Scientists at the Brazilian
National Institute of Amazonian Research argued in the article that this drought response, coupled with the effects of deforestation on regional climate, are pushing the rainforest towards a "
tipping point" where it would irreversibly start to die. It concluded that the forest is on the brink of being turned into
savanna or desert, with catastrophic consequences for the world's climate. A study published in
Nature Communications in October 2020 found that about 40% of the Amazon rainforest is at risk of becoming a savanna-like ecosystem due to reduced rainfall. A study published in
Nature climate change provided direct empirical evidence that more than three-quarters of the Amazon rainforest has been losing resilience since the early 2000s, risking dieback with profound implications for biodiversity, carbon storage and climate change at a global scale. Research from 2025 using hundreds of climate-model simulations says even passing 1.5C of global warming temporarily would trigger a significant risk of Amazon forest dieback. According to the
World Wide Fund for Nature, the combination of climate change and deforestation increases the drying effect of dead trees that fuels
forest fires. in
French GuianaIn 2010, the Amazon rainforest experienced another severe drought, in some ways more extreme than the 2005 drought. The affected region was approximately of rainforest, compared with in 2005. The 2010 drought had three epicenters where vegetation died off, whereas in 2005, the drought was focused on the southwestern part. The findings were published in the journal
Science. In a typical year, the Amazon absorbs 1.5 gigatons of carbon dioxide; during 2005 instead 5 gigatons were released and in 2010 8 gigatons were released. Additional severe droughts occurred in 2010, 2015, and 2016. In 2019 Brazil's protections of the Amazon rainforest were slashed, resulting in a severe loss of trees. According to Brazil's
National Institute for Space Research (INPE), deforestation in the Brazilian Amazon rose more than 50% in the first three months of 2020 compared to the same three-month period in 2019. In 2020, a 17 percent rise was noted in the
Amazon wildfires, marking the worst start to the fire season in a decade. The first 10 days of August 2020 witnessed 10,136 fires. An analysis of the government figures reflected 81 per cent increase in fires in federal reserves, in comparison with the same period in 2019. However, President
Jair Bolsonaro turned down the existence of fires, calling it a "lie", despite the data produced by his own government. Satellites in September recorded 32,017 hotspots in the world's largest rainforest, a 61% rise from the same month in 2019. In addition, October saw a huge surge in the number of hotspots in the forest (more than 17,000 fires are burning in the Amazon's rainforest) – with more than double the amount detected in the same month last year.
Climate change Environmentalists are concerned about
loss of biodiversity that will result from
destruction of the forest, and also about the
release of the carbon contained within the vegetation, which could accelerate
global warming. Amazonian evergreen forests account for about 10% of the world's terrestrial primary productivity and 10% of the
carbon stores in ecosystems – of the order of 1.1 × 1011 metric tonnes of carbon. Amazonian forests are estimated to have accumulated 0.62 ± 0.37 tons of carbon per hectare per year between 1975 and 1996. Though often referenced as producing more than a quarter of the Earth's oxygen, this often stated, but misused statistic actually refers to oxygen turnover. The net contribution of the ecosystem is approximately zero.
Deforestation in the Amazon rainforest region has a negative impact on local climate. It was one of the main causes of the severe
drought of 2014–2015 in Brazil. This is because the moisture from the forests is important to the rainfall in
Brazil,
Paraguay and
Argentina. Half of the rainfall in the Amazon area is produced by the forests. A 2009 study found that a 4 °C rise (above pre-industrial levels) in global temperatures by 2100 would kill 85% of the Amazon rainforest while a temperature rise of 3 °C would kill some 75% of the Amazon. Results of a 2021
scientific synthesis indicate that, in terms of global warming, the
Amazon basin with the Amazon rainforest is currently emitting more
greenhouse gases than
it absorbs overall. Climate change impacts and human activities in the area – mainly wildfires, current land-use and
deforestation – are causing a release of forcing agents that likely result in a net warming effect. One
computer model of future
climate change caused by
greenhouse gas emissions shows that the Amazon rainforest could become unsustainable under conditions of severely reduced rainfall and increased temperatures, leading to an almost complete loss of rainforest cover in the basin by 2100., and severe economic,
natural capital and
ecosystem services impacts of not averting the tipping point. However, simulations of Amazon basin climate change across many different models are not consistent in their estimation of any rainfall response, ranging from weak increases to strong decreases. The result indicates that the rainforest could be threatened through the 21st century by climate change in addition to deforestation. File:Greenhouse Gas by Sector.png|Anthropogenic emission of greenhouse gases broken down by sector for the year 2000. File:September Smoke Over the Amazon from 2005-2008.png|Aerosols over the Amazon each September for four burning seasons (2005 through 2008). The
aerosol scale indicates the relative amount of particles that absorb sunlight. File:Roots by cesarpb.jpg|Aerial roots of red mangrove on an Amazonian river. File:Climate change disturbances of rainforests infographic.jpg|Climate change disturbances of rainforests. ==Conservation==