暴雨、洪水和热浪等极端天气事件被称为中国的“新常态”。
今年四月的暴雨和洪水导致中国损失近120亿元人民币(16.5亿美元),灾害损失“为近10年同期最重”。六月,中国约有33条河流“超过警戒水位”,数十人丧生。广西桂林遭遇自1998年以来最大洪水。
不到一年前,北京气象部门在2023年7月的短短五天内记录了745毫米的降雨量,几乎是该市往年整月的降雨量。
北京周边的河北省在同一时间也出现了强降雨。2023年7月,临城县的降雨量超过1米,是其年平均降雨量的两倍。
2021年7月,河北的邻省河南出现了“千年一遇”的暴雨。
虽然中国已经出台了更多政策来改善其应急系统和基础设施,但日益增多的极端天气事件仍继续带来挑战。
在本篇Q&A中,Carbon Brief将探讨中国近期洪灾的原因、中国如何适应洪灾,以及是否需要未雨绸缪、重新审视其防洪系统。
近期洪灾背后的原因是什么?
近年来频繁发生的暴雨和洪水背后有各种因素。

英国布里斯托尔大学地理科学学院名誉研究员奥利弗·温(Oliver Wing)博士告诉Carbon Brief:“总体而言,由于克劳修斯-克拉佩龙方程,我们预计气候变暖的世界将更加湿润。”
根据该方程,气温每升高1°C,空气中的湿度通常会增加约7%,这意味着气候变暖时降雨量可能会更大。
奥利弗·温指出,“对于日以下降雨量,我们看到的比例关系比该方程所显示的还要大。这使得地表水(更有可能)由于短时和高强度的局部降雨增加而在城市形成洪水”。
此外,他表示,“气候变暖正导致大多数地方的海平面上升,这意味着风暴潮造成破坏的基线更高”。
据《中国日报》引述中国气象局国家气候中心首席预报员郑志海称,自四月份以来,中国广东和广西等南部沿海省份频繁出现强降雨,其原因是“高于正常水平的温度”。
郑志海补充说,厄尔尼诺/南方涛动(在2023年中期进入厄尔尼诺升温阶段的自然气候周期)是部分原因,因为其提高了海面温度,并将大量水蒸气从南中国海和孟加拉湾引向中国南部。
宁波诺丁汉大学地理科学系系主任陈加信博士告诉Carbon Brief,今年4月广东的降雨模式与2023年9月6日至8日台风“海葵”过后的强降雨十分相似。
具体而言,强降雨是由来自东南亚和南亚季风模态中的低压湿气流,与来自菲律宾和西太平洋的另一个低压雨带碰撞产生的。
台风“海葵”给香港带来了140年来最严重的暴风雨,并在广东和福建两省造成了最严重的降雨。
陈加信表示,虽然在气象学意义上这些强烈暴风雨并不罕见,但由于全球变暖,其发生的频率越来越高。
四月是季风季的开始。大范围的暴风雨通常在四月平均发生三次。但是,今年中国仅在该月就遭受了至少八次区域性极端降雨事件侵袭,而且都是接连发生的。
在重庆和湖南等受影响地区,河流洪水的现象十分普遍。对于一般的河流洪水来说,确定原因可能更为复杂。
“有很多调节因素。在气候变暖的情况下,较干燥的土壤可能会使土地吸收更多降雨,从而减轻洪水带来的危害。许多洪水不是由强降雨造成,而是由融雪或落在饱和土壤上的低强度、长时间降雨造成的。 因此,单凭气候变暖导致降雨量增加不能合理推断出河流洪水也会增加。”奥利弗·温说。
陈加信表示,自然原因“当然”增加了湿度,“但人类引起的气候变化导致温室效应,造成海水温度上升,从而引起更多的风暴和低压雨带。这是事实。”
奥利弗·温同意,人类导致的气候变化的“热力学影响”增加了与风暴相关的降雨量。
但他补充道:“我们不甚了解的是,人为气候变化如何改变了气候系统的动态,以及这种变化在哪里和如何加剧或抑制了热力学响应。”
人类导致的气候变化起了什么作用?
许多研究发现,海面温度升高正在加剧高强度的连续极端降雨。
联合国政府间气候变化专门委员会(IPCC)的第六次评估报告(AR6)也指出,温室气体排放造成的人为气候变化导致海洋变暖,这也“很可能是已观测到的全球陆地强降水加剧的主要驱动因素”。
根据第六次评估报告,在全球相比工业化前升温1.5°C的情况下,东亚和中亚极端年最大日降雨量(Rx1)和五日累积降雨量(Rx5)预计将比1971年至2000年分别增加28%和15%。
该报告还指出,与之类似的是,在中国的城市群中,“全球从升温1.5°C增加到2°C可能会使非常潮湿日子的总降水强度增加1.8倍,最大五日降水量增加一倍”。
中国气象局中国气象科学研究院的陈阳教授告诉Carbon Brief,中国人为造成的强降雨的强度甚至超过预期。
“由于气候变暖导致大气湿度增加,潜热释放与潮湿风暴中的上升运动之间的反馈作用更强,因此人为造成的中国季风区强降水的加剧程度明显大于预期。”他解释说。
他补充说,与纬度相似的其他地区相比,这种反馈在中国东部尤为明显。
最近发表在《自然》上的一项研究还预计,由于气候变暖,中国的风暴活动将变得更加频繁和剧烈。研究显示,到21世纪末,中国东部沿海热带气旋的年平均发生频率预计将比现在增加16%。

除了人类活动引发的气候变化之外,城市设计和建造不当,以及地下水开采、城市发展导致的建筑物重量、城市交通系统和采矿活动造成的沉降,也会加剧洪灾。
美国路易斯安那州立大学社会学系助理教授凯文·斯迈利(Kevin Smiley)博士告诉Carbon Brief:“气候变化正在加剧极端天气的严重程度和频率。由气候变化引起的额外降雨可能会导致原本只是建筑物的停车场在下雨天出现水坑,而现在洪水会漫过建筑物大门,造成数千美元的损失。”
“重要的是要记住:气候变化是人为的,所以这种风险的增加也有人为的根源。”
中国如何适应日益频繁的洪水?
中国修建了许多大型水利工程来防止洪涝灾害,例如2002年启动的从长江取水的南水北调工程。
在中国国务院最新公布的《国家水网建设规划纲要》中,在2035年前建成“国家水网”是未来防洪的“骨干”措施之一。
文件中的“骨干”工程还包括主要河流上的大型硬工程结构,如堤防、防洪闸和河道泄洪网络,以减轻洪水风险。
与此同时,发表在《海洋与海岸管理》(Ocean & Coastal Management)杂志上的一项研究发现,“基于自然的解决方案”在中国也变得流行起来。
沿海岸线和河口恢复和保护淡水沼泽、红树林和湿地,正在被用来为潮汐和风暴潮提供缓冲。它们包括上海的崇明岛湿地(长江三角洲)和深圳湾的福田和米埔湿地(珠江三角洲)。
规划文件中提出的另一个概念是“加快智慧发展”,利用互联网、数据和技术来监测和预防洪水。
首都北京已整合高清摄像机、望远镜、雷达图和卫星云图的数据,以提供实时灾害更新,从而改善应急响应时间。
中国东部港口城市宁波与电信公司合作,分析大数据并发布信息。
应急管理部表示,这些措施使2018年至2022年因自然灾害造成的死亡和失踪人数与2013年至2017年相比减少了54%。2023年,死亡人数继续下降,但与2018年至2022年水平相比,被毁建筑物数量和直接经济损失分别上升了97%和13%。
2015年,海绵城市的概念被写入住房和城乡建设部的政策文件。该计划在全国推广,武汉(1100万人口)、郑州(1000万人口)等30个主要城市被选为试点城市。

这些海绵城市旨在通过城市地区的“绿蓝设施”,如绿色屋顶、透水路面和雨水公园,收集、净化和再利用至少70%的洪水。整个系统旨在一次性解决城市供暖、淡水匮乏和洪水泛滥等问题。
中国也改进了其恢复过程。例如,在2021年台风“烟花”期间,宁波的洪灾受害者通过改进的在线文件系统,在一小时内就能获得经济补偿。
这些措施效果如何?
陈加信告诉 Carbon Brief,中国“在洪水和干旱灾害的准备、应对和恢复方面做得非常好”,这是两种最具破坏性的自然灾害。
“作为一个全球南方国家,”他将中国称为发展中国家,“中国用海绵城市和增强生态的解决方案应对气候变化,做得相当不错”。
然而,温认为,基于自然的解决方案,如海绵城市,可能会“很快饱和”,因此“它们的作用可能会被夸大”。他继续说:
“这些类型的干预措施对于相对频繁的低强度降雨最有效。在非常强烈、罕见的降雨(其概率在全球变暖的情况下迅速变化)期间,它们将很快不堪重负,造成最大的破坏和痛苦。”
2021 年,一场“历史罕见”的暴雨和洪水影响了海绵城市郑州 1400 多万人,造成 398 人死亡,凸显了海绵城市在气候变化面前的局限性。
《自然》杂志的研究称,海绵城市的设计只能承受 30 年一遇的降雨事件。陈加信说,除此之外,它还会造成一种虚假的安全感。它鼓励更多人迁往高风险地区,导致这些地区的人口和资产增加,而这些聚集地的保护需求也应声而涨,形成一种被称为“堤坝效应”的循环。
堤坝效应是一种悖论:修建防洪堤坝会导致人们对洪水风险的认知降低,业主更有可能投资于自己的房产,从而增加堤坝决口时的潜在损失。
根据《自然》杂志的论文,洪水的影响是人口稠密的黄河三角洲和珠江流域面临的一个关键挑战,这两个地区都面临着很高的洪水风险。
斯迈利说:“当社会的脆弱性与灾害交织在一起时,风险就会显现出来。脆弱性是社会性的,社会脆弱性越大,洪水的影响就越大……社会的脆弱性还是不公平的。一个有一定财富和良好保险的家庭,比一个靠薪水度日的家庭能更快、更成功地从洪水中恢复过来。”
中国政府通过特别政府债券拨款超过一万亿元人民币(1380 亿美元),用于支持弱势公民和今年 3 月遭受自然灾害的地区重建。据官方媒体《环球时报》报道,超过一半的资金将用于“防洪等水利工程建设”。
但过去,财政支持的提供一直受到质疑。全球再保险公司慕尼黑再保险(Munich Re)称,2023 年台风杜苏芮袭击中国时,在总计约 250 亿美元的损失中,只有 20 亿美元得到了承保。
此外,2015 年至 2018 年间,这些海绵城市的建设已经花费了中国 15-18 亿元人民币(2.1-2.5 亿美元)。维护费用将使这笔费用更高。
《自然》杂志的作者建议政府应致力于将分散的“灰色基础设施”(排水沟、管道和泵站等建筑结构)整合到现有的绿色蓝色设施中,但不应仅仅依赖工程基础设施。
中国科学院西北生态环境资源研究所研究员舒乐乐博士告诉《知识分子》杂志:“仅靠传统的工程方法无法减轻目前强降雨的影响”。
“每次下大雨,它造成的损失都会成为头条新闻,主要是因为城市里住着太多人,”舒补充道。
洪水易发地区的政府部门合作不当也导致灾害管理缺乏统一调配。
《自然》杂志的研究补充说,就长江和珠江三角洲而言,其缺乏一个覆盖全区的、且可以“把地划分土和投资融合起来的水文系统”。
中国社会科学院生态文明研究所研究员郑艳博士在 2023 年北京洪水过后指出,政府机构往往只顾自己的管辖范围,只想着转移问题,迅速疏导洪水,这给下游地区的城市带来了压力。
斯迈利说:“洪水不会在意人为划定的市、区或省的边界。一个地方有效的城市设计可能会减轻那里的洪水风险,但会间接增加其他地方的风险。以正义为中心、集体思考(统一筹划)可以提供一个本地化的解决方案来帮助所有人有效恢复,而不是加剧不平等。”
中国可以从其他城市学到什么?
洪水是世界各地城市都面临的挑战,中国因此可以借鉴大量的想法和技术。
《自然》杂志的论文建议,长江三角洲和珠江三角洲可以向恒河-布拉马普特拉河-梅格纳河三角洲和湄公河三角洲学习,“通过利用和调整因气候变化和人类活动而迅速变化的三角洲潜在动态,改善其对沉降和侵蚀等区域挑战的应对”。
该论文还提倡建设一个“积极主动、具有前瞻性、具有足够能力限制洪水破坏性影响并及时恢复灾前状态”的弹性社会。
鹿特丹是一座四面环水、人口 60 万的荷兰三角洲城市。鹿特丹建造了蓄水设施,例如具有蓄水功能、面积相当于四个奥林匹克游泳池的地下停车场, 且安装了绿色屋顶和外墙来吸收雨水。
日本在东京郊区埼玉县在地下建造了一个复杂的混凝土隧道和拱顶网络。这个网络位于大约地下 14 层,可容纳的雨水可以装满 1,000 多个奥运会标准泳池。
这两个城市的地下洪水转移设施经常被用作气候变化前沿城市可行的防洪系统的典范。
香港在跑马地马场的下方也有一个类似的地下雨水储存系统,旨在抵御 50 年一遇的洪水事件。
然而,陈加信表示,防洪措施的有效性难以横向比较,因为每个城市的地理、人口、密度和地形都非常不同。
他告诉 Carbon Brief:“在我看来,中国的特大城市应该考虑利用地下空间来储存超强暴雨突然排放的极端雨水……东京和鹿特丹利用地下空间的做法就相当明智。”
The post Q&A:中国如何适应日益频繁的洪灾 appeared first on Carbon Brief.
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Climate Change
As El Niño intensifies, we should be investing more in the world’s farmers
An exceptional El Niño is building. The World Meteorological Organization (WMO) says it has intensified to very strong levels and is likely to last at least through February 2027. If its current trajectory holds, it could become stronger than anything seen since WMO monitoring began four decades ago.
That is bad news for agriculture. El Niño – a naturally occurring weather phenomenon – can scramble rainfall patterns across the world, bringing drought to some regions and floods to others. And this time it is unfolding against the backdrop of a significantly hotter climate, with farmers already contending with unreliable growing seasons, extreme heat and less predictable rainfall because of global warming.
El Niño expected to bring next record-hot year as soon as 2027
We are seeing the consequences already. In Sri Lanka, drought linked to El Niño has dried wells and reservoirs and cut into crops and farmer incomes. Indonesia is experiencing its worst wildfire season in 11 years, with prolonged drought and extreme heat exacerbated by El Niño. And in Peru, authorities are preparing for the opposite extreme: intense rains, flooding and landslides which the national civil-defence agency says could affect around 1.2 million people.
These impacts will multiply as El Niño intensifies.
And yet, just as the risks to food production are rising, the money available to help farmers withstand them is shrinking.
10% funding decline in 2024
A forthcoming analysis from the Food and Agriculture Organization (FAO) shows that climate-related development finance for agrifood systems is moving in the wrong direction. In 2024, the latest year for which data is available, it fell by 10 percent compared with a 2 percent overall decline. The sectors that put food on our tables — crops, livestock, forestry and fisheries — received just 5 percent.
Yet this is precisely the moment when climate investment in agriculture needs to grow, not shrink. It can help communities adapt, build resilience and protect food security, while unlocking larger flows of public and private finance. Agriculture feeds us, supports the livelihoods of well over a billion people, and is often the first sector hit by drought, floods and extreme heat. Cutting that investment now is a false economy.
One failed harvest can plant the seed for the next crisis, forcing farmers to eat the seed they have saved for planting, sell livestock or tools, or take on debt. It can also deepen food insecurity, disrupt supply chains and drive up prices, showing up months later in supermarket aisles far away.
The Central American Dry Corridor, stretching through much of the region, shows both how exposed farmers are, and what investment can do. Based on an analysis of 41 years of satellite observations, FAO finds that some crop and pasture areas there face more than a 50 percent chance of agricultural drought over the coming months.
About half of Central America’s 1.9 million producers of maize, beans and other basic grains live in the Dry Corridor. Many grow food both for sale and for their own families. When a harvest fails, they lose both income and dinner.
El Salvador project conserves water and soil
In El Salvador, which lies within the Dry Corridor, more than 50,000 farmers have adopted practices to better withstand drought and increasingly unreliable rainfall through RECLIMA, a project financed by the Green Climate Fund and implemented by FAO in partnership with the government of El Salvador. It has substantial national co-financing, including from the country’s Environmental Investment Fund.
El Niño can intensify El Salvador’s annual mid-season dry spell, known as the canícula, turning it into a longer, harsher drought just as maize needs water most.


For María Cristina Corvera de López, a second-generation farmer in rural Nahualapa, adapting means changing how every drop of rain is captured and used. She plants trees alongside her crops to provide shade and minimise evaporation and uses simple irrigation channels and a homemade drip system to conserve water. Instead of burning stalks, leaves and husks after harvest, as generations before her did, she turns them into mulch to hold moisture in the soil.
“The effects of climate change are a constant challenge,” she says. But the new techniques have made her farm more resilient to El Niño as well. Where she once harvested about 50 bags of maize per acre, she now gets around 80, even during droughts. It’s enough to feed her family and sell the surplus.
Managing risk now cuts future costs
Together, these adaptations can mean the difference between losing a crop and getting through a dry season with enough food, seed and income to plant again. They are also the result of climate finance invested before disaster strikes.
RECLIMA shows what that kind of adaptation investment can buy. Adaptation accounted for 45 percent of climate-related development finance to agrifood systems in 2024, and multilateral development banks are directing more agricultural finance towards resilience. That shift reflects a growing recognition that adaptation is a form of risk management, not just a development cost.
We need much more of it. The same investments that help farmers withstand El Niño also enable them to adapt to a hotter, more unpredictable future. Cutting investment in the people who produce our food just as climate risks intensify does not save money. It simply pushes a much larger bill into the next harvest, the next food crisis, and the next El Niño.
The post As El Niño intensifies, we should be investing more in the world’s farmers appeared first on Climate Home News.
As El Niño intensifies, we should be investing more in the world’s farmers
Climate Change
Analysis: Lula presidency saved at least 20,000km2 of Brazilian Amazon since 2022
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.

This analysis is based on a 2023 study on the role of nature-based solutions in Brazil’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’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’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’ve been saying that Lula’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.”

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’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
Brazil’s biodiversity pledge: Six key takeaways for nature and climate change
COP30: Could Brazil’s ‘Tropical Forest Forever’ fund help tackle climate change?
Guest post: How Caribbean states are shaping climate legislation
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
Climate Change
Alive on Earth, with you

This letter is a bit more direct and longer than most of those which I write, but I hope you will be okay with that, because the times seem to call for being plain.
A few weeks ago I got a text message from an old and dear friend —let’s call her Hannah.
I have enough shared life with Hannah that, whenever we talk, the conversation always feels current and effortless, despite gaps of months or even years.
Hannah has been talking with her son — we’ll call him Neil — who is a teenager and doing well in school, but wildly worried about the state of the world, including the imminent trajectory of global warming. Hannah and I don’t text each other other very often, but on this occasion she’s reached out with something visceral:
Neil has challenged me to point him to something hopeful, if I can find it. He says so far no one is showing any will to uphold the Paris Agreement. I am checking in to see how you still manage to have real hope.*
Then, just a few days later, the United Nations Environment Programme Limiting Overshoot report landed, containing the principal finding that it is likely the global temperature will soon exceed 1.5°C.
After that news, and the real time devastation in Nepal, and in the context of the broader state of the world, I found myself having multiple conversations with friends and colleagues about the structure of hope. I want to openly share that after a few of these exchanges, I metaphorically closed the blinds, and wondered how to feel, and what to do, because there is no avoiding the dreadfulness of the news, and what it means for the suffering of people and life on Earth.
But if you are fortunate enough to have time, space and security to do so, then after the darkness, you open the shutters and once again there is light. This is the structure of my innermost resolve.
* * *
Our lives — those of us living on our magnificent earth now — have the greatest possible purpose.
There is virtually no problem that we endlessly clever and creative, human beings cannot solve, when we work together.
And we are not just intelligent and ingenious; we are inherently social, nurturing and brave; capable of the deepest enduring love.
Each of the roughly 12,000 generations of humanity so far has made life possible for those who have followed, through acts of devotion.
Babies have been held and fed. Water and food have been found and shared. Shelter has been built. For 12,000 generations we have held the hands of our children.
Every single one of us was once carried in the arms of another, unable to walk ourselves. It is our thoughtfulness, kindness and care that have seen us through as a species. Sometimes this has been in the most exigent of circumstances, when enough of our ancestors did not give in, faced incredibly difficult things, to somehow make it through.
And so it comes to this. To what we now must do. We must do as 12,000 generations of people did for us.
The struggle to keep global warming to under 1.5 degrees may be over. The battle of return—to get our planet back to safe temperatures at emergency speed and scale — is just beginning. Upon this struggle depends the future of all we care about, and that of all life on Earth. The prospects of the next 12,000 generations are conditioned by our efforts now.
Our work now is to keep the overshoot as low as we can, make it as brief as possible, and do everything within our power to alleviate other pressures on nature. It is to take care of humanity — of one another — in the face of mounting climate and ecological damage. And by these efforts, create the conditions for future flourishing. Every fraction of every degree matters.
What must now be done is hard, much tougher than should have been necessary, because of the vested interests in coal, oil and gas and deforestation, and the failures of decision makers. And while renewable energy has surged, making the case for change much simpler, on the other side of the ledger there’s the reactionary and gangsterist turn of politics and the multiplier effects of wars and mass violence, with the existential destabilisation of big tech looming over all.
There is no sugarcoating the scale of difficulty. But what is necessary remains within our collective power. We must never, for one second, say that returning our planet to flourishing is impossible — many of the obvious solutions already exist; but even where transformation relies on reforms, technologies or capabilities that might sound fanciful, or historical changes that are unprecedented, this can be no barrier to our conviction. After all, much of what we take for granted today as ordinary features of social life, would have been considered impossible by every single generation before us.
The world has not been destroyed by nuclear war; we solved the growing hole in the ozone layer; Antarctica was kept sacrosanct from exploitation. Humanity has collectively triumphed before, and can do so again.
We can find the necessary social and political will to do what is needed because these are endlessly renewable resources. The necessary financial capital exists. Apart from the fossil fuel industry, the greatest barrier we face is to mistakenly concede that what lies before us is insurmountable. It is not.
We must avoid the siren song of fatalism. Because. It. Is. Never. Too. Late.
None of which is to be insensitive to the horrors already unleashed — the deadly and grotesque harm to people, places and species that cannot be undone; or to be blind to the impacts that are coming. But where we have the power to act, we also have the responsibility — and the extraordinary privilege — to do what must be done.
Although she is wounded, our planet is still alive and beautiful beyond all of our comprehension. Hundreds of billions of creatures live and thrive still upon this earth. Nothing has happened until it has happened, and life fights for life. Every beetle, every tree, all the fish in the ocean, the smallest of the geothermal shrimps, the greatest of the whales and the mightiest of the birds — all demand life every second of their existence, so that their species too may have future generations.
No individual has to know how to solve this alone. Indeed, finding some detachment and humility is essential to concentrate on the role that each of us can play.
Hope is not merely a mindset or a story we tell ourselves. Collective power is not abstract; it is what we do, together, applying ourselves to the practical mechanics of change and contestation within society, by being part of the organisations and networks of people that are dedicated to effective strategies. It is why I am so committed to Greenpeace.
Working from without and within, there are opportunities to make rapid change within institutions, governments, businesses and communities to create the social, economic and political momentum for emissions reduction at speed and scale, reminding ourselves always of what remains possible, even if it hasn’t happened yet.
We can return the planet to safer temperatures. We can put technologies back in the service of people and life. We can return to the assumptions that seemed so obvious just one generation ago — that it is both possible, and our obligation, to build a better future for all people, and for life on Earth.
I did write back to Hannah and Neil, to say honestly to a treasured friend and her son, that yes, as a matter of faith, conviction, evidence and strategy, absolutely there is real hope. And this is a pledge not just to Neil and his generation, but to the next 12,000.
Together, we have the power. Together, we cross this bridge through the dark. To secure an Earth capable of nurturing life in all of its magnificent diversity.
We did not choose to carry this historic responsibility, but here we are. And it is so lucky that we are here.
I wouldn’t choose any other time to be here, alive on Earth, with you.

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