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2019 Amazon rainforest wildfires

Wildfires in Brazil

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Through Amazon rainforest, Carbon dioxide and Carbon monoxide

The increasing rates were first reported by Brazil's National Institute for Space Research (Instituto Nacional de Pesquisas Espaciais, INPE) in June and July 2019 through satellite monitoring systems, but international attention was drawn to the situation by August 2019 when NASA corroborated INPE's findings, and smoke from the fires, visible from satellite imagery, darkened the city of São Paulo despite being thousands of kilometers from the Amazon. As of August 29, 2019, INPE reported more than 80,000 fires across all of Brazil, a 77% year-to-year increase for the same tracking period, with more than 40,000 in the Brazil's Legal Amazon (Amazônia Legal or BLA), which contains 60% of the Amazon. Similar year-to-year increases in fires were subsequently reported in Bolivia, Paraguay and Peru, with the 2019 fire counts within each nation of over 19,000, 11,000 and 6,700, respectively, as of August 29, 2019. It is estimated that over 906 thousand hectares (2.24×106 acres; 9,060 km2; 3,500 mi2) of forest within the Amazon biome has been lost to fires in 2019. In addition to the impact on global climate, the fires created environmental concerns from the excess carbon dioxide (CO2) and carbon monoxide (CO) within the fires' emissions, potential impacts on the biodiversity of the Amazon, and threats to indigenous tribes that live within the forest. Ecologists estimated that the dieback from the Amazon rainforest due to the fires could cost Brazil US$957 billion to US$3.5 trillion over a 30-year period.

The increased rate of fires in Brazil has raised the most concerns as international leaders, particularly French president Emmanuel Macron, and environmental non-government organizations (ENGOs) attributed these to Brazilian president Jair Bolsonaro's pro-business policies that had weakened environmental protections and have encouraged deforestation of the Amazon after he took office in January 2019. Bolsonaro initially remained ambivalent and rejected international calls to take action, asserting that the criticism was sensationalist. Following increased pressure at the 45th G7 summit and a threat to reject the pending European Union–Mercosur free trade agreement, Bolsonaro dispatched over 44,000 Brazilian troops and allocated funds to fight the fires, and later signed a decree to prevent such fires for a sixty-day period.

Other Amazonian countries have been affected by the wildfires in higher or lesser degree. The number of hectares of Bolivian rainforest affected by the wildfires were roughly equal to those of Brazil, being the area of Bolivia only about one-eighth of Brazil's. Bolivian president Evo Morales was similarly blamed for past policies that encouraged deforestation, Morales has also taken proactive measures to fight the fires and seek aid from other countries. At the G7 summit, Macron negotiated with the other nations to allocate US$22 million for emergency aid to the Amazonian countries affected by the fires.

Amazon forest and deforestation

There are 671 million acres of Amazon rainforest. Human-driven deforestation of the Amazon rainforest has been a major concern for decades as the rainforest's impact on the global climate has been measured. From a global climate perspective, the Amazon has been the world's largest carbon dioxide sink, and estimated to capture up to 25% of global carbon dioxide generation into plants and other biomass. Without this sink, atmospheric carbon dioxide concentrations would increase and contribute towards higher global temperatures, thus making the viability of the Amazon a global concern. Further, when the forest is lost through fire, additional carbon dioxide is released to the atmosphere, and could potentially contribute significantly to the total carbon dioxide content. The flora also generates significant quantities of water vapor through transpiration which travel large distances to other parts of South America via atmospheric rivers and contribute to the precipitation in these areas. Due to ongoing global climate change, environmental scientists have raised concerns that the Amazon could reach a "tipping point" where it would irreversibly die out, the land becoming more savanna than forest, under certain climate change conditions which are exacerbated by anthropogenic activities.

Human-driven deforestation of the Amazon is used to clear land for agriculture, livestock, and mining, and for its lumber. Most forest is typically cleared using slash-and-burn processes; huge amounts of biomass are removed by first pulling down the trees in the Amazon using bulldozers and giant tractors during the wet season (November through June), followed by torching the tree trunks several months later in the dry season (July through October). Fires are most common in July through August. In some cases, workers performing the burn are unskilled, and may inadvertently allow these fires to spread. While most countries in the Amazon do have laws and environmental enforcement against deforestation, these are not well enforced, and much of the slash-and-burn activity is done illegally.

Deforestation leads to a large number of observed fires across the Amazon during the dry season, usually tracked by satellite data. While it is possible for naturally occurring wildfires to occur in the Amazon, the chances are far less likely to occur, compared to those in California or in Australia. Even with global warming, spontaneous fires in the Amazon cannot come from warm weather alone, but warm weather is capable of exacerbating the fires once started as there will be drier biomass available for the fire to spread. Alberto Setzer of INPE estimated that 99% of the wildfires in the Amazon basin are a result of human actions, either on purpose or accidentally. Man-made fires in the Amazon also tend to elevate their smoke into the higher atmosphere due to the more intense burn of the dry biomass, compared with naturally occurring wildfires. Further evidence of the fires being caused by human activity is due to their clustering near roads and existing agricultural areas rather than remote parts of the forest.

On November 18, 2019, Brazilian authorities announced the official deforestation figures, based on the PRODES satellite monitoring system for the 2019 forest year—from August 1, 2018, to July 31, 2019. The rate of deforestation was the "worst in more than a decade" with 970,000 hectares (2,400,000 acres) lost.

In August 2020 Brazil's National Institute for Space Research reported that satellite data shows that the number of fires in the Amazon increased by 28% to ~6,800 fires in July compared to the ~5,300 wildfires in July 2019. This indicated a, potentially worsened, repeat of 2019's accelerated destruction of one of the world's largest protectable buffers against global warming in 2020.

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