Print article Share Article Contents Expand menu Close ‘Brazil is back’ New Jersey-sized forest Election significance ‘Greenest’ policies Soy moratorium and Brazilian congress An area of Amazon forest roughly the size of the US state of New Jersey has remained standing due to Luiz Inácio Lula da Silva’s leadership of Brazil, according to Carbon Brief analysis. Lula beat Jair Bolsonaro in the 2022 election to become president of the nation that is home to nearly 60% of the Amazon rainforest. Forest loss surged during Bolsonaro’s far-right presidency and dropped sharply under the left-wing Lula, with Amazon deforestation likely to hit its lowest level on record this year. Now, as another presidential election approaches, Lula is facing off against Bolsonaro’s son, Flávio Bolsonaro, whose “anti-environmental” policies are similar to his father’s. Carbon Brief’s analysis suggests that at least 20,000 square kilometres (km2) of deforestation has been avoided since Lula took office and prioritised Amazon protection. The analysis is based on modelling by an international research team of an alternative scenario in which Brazil’s flagship forest code legislation was not enforced – a proxy for Jair Bolsonaro’s leadership. Experts tell Carbon Brief that this estimate is likely “conservative” and that actual deforestation under Bolsonaro could have been “much higher”. With Lula and Flávio Bolsonaro tied in the polls, the upcoming election is expected to significantly shape the level of environmental action in the world’s fourth-largest emitter, whose emissions are largely driven by deforestation. ‘Brazil is back’ When Jair Bolsonaro was president of Brazil between 2019 and 2022, he championed the nation’s powerful agribusiness sector and oversaw an unprecedented increase in Amazon deforestation. Bolsonaro weakened regulations, slashed federal agency budgets and empowered illegal activities in the Amazon, while attacking Indigenous and environmental groups. This meant that the forest code – Brazil’s flagship legislation that requires landowners to preserve and restore forest on their property – was not properly enforced. After Lula’s presidential victory in 2022, he promised to target “zero deforestation” by 2030, telling the COP27 UN climate summit that “Brazil is back”. Lula rolled back Bolsonaro’s wave of deregulation and reinstated a deforestation “action plan”. Led by celebrated environmentalist Marina Silva, the environment ministry scaled up enforcement and policing activities in the Amazon. As a result, annual deforestation in the Amazon has more than halved from 11,594km2 per year in 2022 to 5,731km2 in 2025. Data from August 2025 to July 2026 – the timespan used in government records – is yet to be released, but preliminary satellite alerts put the deforestation figure at 2,874km2. While the final figure is likely to be higher, experts still think Amazon deforestation in 2026 could hit its lowest level since records began in 1988. New Jersey-sized forest Compared to a scenario in which Bolsonaro won in 2022, Carbon Brief analysis suggests that at least 20,000km2 of Amazon forest remains standing today due to Lula’s leadership. This area – roughly the size of Wales, Belize, Slovenia or the US state of New Jersey – is indicated by the grey area in the chart below. Each year covers a period from August to July. Deforestation data is from INPE’s PRODES dataset, except for the 2026 figure. This is based on INPE’s DETER real-time satellite alert data, which tends to give lower estimates than PRODES. The “Bolsonaro” projections are based on a scenario with no forest code enforcement, from a 2023 study. This analysis is based on a 2023 study on the role of nature-based solutions in Brazil&#8217;s pathway to net-zero emissions. This was a refined update of a 2018 study that used the same GLOBIOM-Brazil model, from researchers at the University of Oxford, the International Institute for Applied Systems Analysis and Brazil&#8217;s National Institute for Space Research (INPE). It is based on a comparison of forest code implementation with a “baseline” scenario in which the code is not enforced, reflecting the kind of weak governance seen under the Bolsonaro administration. (See Carbon Brief’s 2022 article for more details of this modelling.) Dr Aline Soterroni, a University of Oxford researcher who led the 2023 analysis, tells Carbon Brief that the reversal seen under Lula “shows how quickly deforestation can respond to political will”. However, she stresses that the modelling of the “no forest code” scenario is “relatively conservative”, with deforestation remaining high but not rising. Deforestation in this scenario – used here as a proxy for a Bolsonaro election win – is tempered by slower demand growth for Brazilian beef and soy, says Soterroni. She notes that the scenario also does not capture the potential for illegal forest clearing in response to weak governance. Indeed, some experts anticipated in 2022 that a Bolsonaro victory would send deforestation rates rising to near-record levels. Claudio Angelo, international policy coordinator at Brazil&#8217;s Climate Observatory, tells Carbon Brief that if Bolsonaro had won in 2022, “we have reason to believe [this would have resulted] in much higher rates than during his first term”. Angelo says the “political signal” would likely have driven an “explosion of wildcat mining” and illegal deforestation in the Amazon. He also points to efforts – including by Flávio Bolsonaro – to formally dismantle the forest code in the Brazilian congress, during Jair Bolsonaro’s first term. Soterroni notes that deforestation rates did not immediately drop following Lula’s election, as suggested by modelling of a full “forest code compliance” scenario. She says this reflects the “gradual and imperfect process” of restoring and enforcing the law. Nevertheless, she tells Carbon Brief: “The key message from our modelling is the contrast between these trajectories: weak environmental governance keeps deforestation substantially higher than full implementation of the forest code. That message remains relevant today.” Election significance With Jair Bolsonaro in prison for plotting a coup after losing the 2022 election, his son Flávio Bolsonaro, a senator for Rio de Janeiro, is standing against Lula in the upcoming contest for president. There are 13 candidates, but Flávio Bolsonaro and Lula are by far the frontrunners and are currently neck-and-neck in opinion polls. If Lula wins, experts say he is likely to continue with the “zero deforestation by 2030” agenda that has already had a pronounced impact on forest loss. As the chart below shows, periods when Amazon deforestation fell in recent history all occurred during Lula’s three terms as president. In contrast, experts say Flávio Bolsonaro, a climate sceptic who has indicated he will continue his father’s political agenda and favour agribusiness and mining, will likely drive a surge in deforestation. Angelo tells Carbon Brief: “At the risk of sounding alarmist, I&#8217;ve been saying that Lula&#8217;s re-election is the only thing standing between us and a wide destruction of the Amazon.” A Bolsonaro win would be a “tremendous disaster”, says Dr Patricia Pinho, deputy science director at the Amazon Environmental Research Institute, adding: “I don’t think we can afford four years of increasing deforestation [and] violence against Indigenous peoples.” Dr David Lapola, an ecologist focused on Amazon research at the University of Campinas in Brazil, says he believes deforestation “would certainly rise” and Brazil’s climate and deforestation goals “would be thrown in the trash bin”. He tells Carbon Brief: “The Bolsonaro administration in the 2019-2022 period showed that the deconstruction of environmental policies and institutes can be done very, very quickly. “In a matter of a few months, they can destroy what has been constructed over decades of environmental policy and activism in Brazil.” ‘Greenest’ policies Lula has the “greenest” policy proposals of Brazil’s six top-polling presidential candidates, according to analysis by the Climate Observatory. The analysis identifies 16 “positive and detailed” environmental commitments in Lula’s proposals, including reaffirming his “zero deforestation by 2030” goal. Flávio Bolsonaro, on the other hand, has one positive environmental commitment and seven “clearly anti-environmental” proposals. The right-wing politician has committed to zero “illegal” deforestation by 2029. However, he has also previously led an attempt to change the forest code, opening up large tracts of previously out-of-bounds forest for legal clearance by extractive industries. Given this, Angelo tells Carbon Brief that he is sceptical about the 2029 pledge. “The only way you can trust him on this is to think that he is going to revoke the forest code and make all illegal deforestation legal.” Brazilian presidential candidate Flávio Bolsonaro with a cardboard cutout of his father, former president Jair Bolsonaro. Credit: ZUMA Press, Inc. / Alamy Stock Photo Lula is also the only major candidate to list a clear target for cutting national emissions, sticking with Brazil’s existing goal to cut emissions by 59-67% by 2035, compared to 2005 levels. Overall, the Climate Observatory notes that climate change and environmental issues “are off the radar for most candidates”, who are instead focusing on the economy and security issues. Pinho adds that deforestation and the Amazon have not been at the “forefront” of this election, compared to 2022. If Bolsonaro wins, up to 95% of the Amazon would fall under the leadership of right-wing national governments – including those in Bolivia, Colombia, Ecuador and Peru – reported Mongabay. It noted that presidents in all these nations “explicitly favour agribusiness and mining over environmental conservation”. If no candidate receives a majority of votes in the first round of Brazil’s election on 4 October, a runoff will take place on 25 October, as has happened at every presidential election since 1998. Soy moratorium and Brazilian congress Other factors will also play a role in future deforestation in Brazil, regardless of the next president. One is the effective end of the Amazon soy moratorium. This is a voluntary agreement signed by companies committing to not buy soya beans grown on land in the Brazilian Amazon that was deforested after 2008. Conservation organisation WWF’s international director general, Kirsten Schuijt, previously described it as the “most impactful voluntary supply chain policy ever implemented”. However, major grain traders withdrew from the agreement earlier this year, effectively bringing it to an end. Pinho describes this move as a “huge destruction” of Brazil’s environmental protections. Research shows the moratorium prevented around 18,000km2 of deforestation in its first decade of operation from 2005-16. In contrast, a 2026 study estimated that the end of the moratorium could result in 14,000km2 of additional deforestation in the Amazon by 2036. Alongside choosing a new president on 4 October, Brazilian voters will elect state governors and members of congress, which will also factor into future environmental impacts. Right-leaning parties, including the far-right Liberal Party linked to the Bolsonaros, currently hold half the seats of the two chambers of congress. This has led to conflict between lawmakers and Lula. For example, in 2025, congress bypassed Lula’s veto of several aspects of a controversial piece of legislation dubbed the “devastation bill”. Pinho says that the potential for a right-wing congress and president would be “devastating for the environmental and climate agenda”. Lapola notes that a Flávio Bolsonaro presidency “would consolidate the view in Brazil that environmental protection is solely a matter of political preference, and not a crucial need of all people”. He adds: “Land pillage, destruction of precious biodiversity and scorning of Indigenous peoples simply cannot be a nation&#8217;s project in the 21st century. We have got to be smarter than that, for sure.” related Q&A: What change of power in Colombia could mean for world’s fossil-fuel transition 26.06.2026 International policy Brazil’s biodiversity pledge: Six key takeaways for nature and climate change 16.01.2026 Nature policy COP30: Could Brazil’s ‘Tropical Forest Forever’ fund help tackle climate change? 05.11.2025 COP30 Belém Guest post: How Caribbean states are shaping climate legislation 10.10.2025 The post Analysis: Lula presidency saved at least 20,000km2 of Brazilian Amazon since 2022 appeared first on Carbon Brief.

Analysis: Lula presidency saved at least 20,000km2 of Brazilian Amazon since 2022

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