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From trash to jet fuel 从垃圾到飞机燃料
IF 27.1 1区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-11-03 DOI: 10.1038/s41893-025-01675-w
Candelaria Bergero, Nicoletta Brazzola
Aviation is one of the hardest sectors to decarbonize, and so every clean energy source that can be turned into fuel should be considered — even trash. A study now finds that trash-based fuels may be able to cut aviation emissions by around 16%, while offering cost savings relative to traditional mitigation pathways.
航空业是最难脱碳的行业之一,因此每一种可以转化为燃料的清洁能源都应该被考虑——甚至是垃圾。一项研究发现,基于垃圾的燃料可能能够将航空排放量减少约16%,同时相对于传统的减排途径节省成本。
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引用次数: 0
Doubling of the global freshwater footprint of material production over two decades 二十年来,全球物质生产的淡水足迹翻了一番
IF 27.1 1区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-10-30 DOI: 10.1038/s41893-025-01661-2
Yao Wang, Fengmei Ma, Heming Wang, Asaf Tzachor, Meng Jiang, Kai Fang, Sai Liang, Bing Zhu, Edgar G. Hertwich, Manfred Lenzen, Heinz Schandl, Stephan Lutter
Producing essential, widely used materials such as steel, cement, paper, plastics and rubber requires substantial freshwater resources, which may exacerbate water scarcity. Despite this, comprehensive research on freshwater embodied in material production remains limited. Here we assess the blue water footprint (WFblue) of 16 metallic and non-metallic material categories across 164 regions, using a multiregional input–output model and the hypothetical extraction method. Our findings indicate that the global WFblue of material production doubled from 25.1 billion m3 in 1995 to 50.7 billion m3 in 2021, raising its share in global blue water consumption from 2.8% to 4.7%. The East, South Asia and Oceania regions saw an alarming 267% surge in WFblue for material production, with China—already facing medium-high water stress—experiencing a dramatic ~400% increase. As material production is expected to grow, we underscore the urgency of a water–materials nexus approach, particularly in water-stressed countries. Many of the materials that our everyday lives rely on come with a hidden freshwater cost during production. The embodied water in materials has surged in material production with the potential to exacerbate regional water scarcity.
生产广泛使用的基本材料,如钢铁、水泥、纸张、塑料和橡胶,需要大量淡水资源,这可能会加剧水资源短缺。尽管如此,对体现在物质生产中的淡水的全面研究仍然有限。本文采用多区域投入产出模型和假设提取方法,对164个地区16种金属和非金属材料的蓝水足迹(WFblue)进行了评估。我们的研究结果表明,全球WFblue材料生产从1995年的251亿立方米增加到2021年的507亿立方米,其在全球蓝水消耗中的份额从2.8%提高到4.7%。东亚、南亚和大洋洲地区的WFblue在材料生产方面出现了惊人的267%的增长,而已经面临中高水资源压力的中国则出现了高达400%的增长。由于预计材料生产将增长,我们强调水-材料联系方法的紧迫性,特别是在水资源紧张的国家。我们日常生活所依赖的许多材料在生产过程中都有隐藏的淡水成本。在物质生产过程中,物质中蕴含的水分激增,有可能加剧区域水资源短缺。
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引用次数: 0
Sinking Indian megacities 正在下沉的印度大城市
IF 27.1 1区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-10-28 DOI: 10.1038/s41893-025-01667-w
Ekbal Hussain, Luke Bateson, Alessandro Novellino
Ground subsidence is an increasingly important hazard in cities around the world. Satellite measurements of ground movements show dramatic levels of sinking in five Indian cities and are used to map the risk of damage to buildings in these cities.
地面沉降是世界各地城市日益严重的危害。对地面运动的卫星测量显示,印度五个城市的下沉程度非常严重,并被用于绘制这些城市建筑物受损风险的地图。
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引用次数: 0
Building damage risk in sinking Indian megacities 下沉的印度大城市的建筑损坏风险
IF 27.1 1区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-10-28 DOI: 10.1038/s41893-025-01663-0
Nitheshnirmal Sadhasivam, Leonard Ohenhen, Mohammad Khorrami, Susanna Werth, Manoochehr Shirzaei
Building damage poses serious safety risks, causing substantial financial losses worldwide. Engineering shortcomings are commonly cited as the cause of long-term structural failures, often neglecting the exacerbating role of land subsidence. Here we used satellite radar observations during 2015–2023 to estimate differential settlements at 5 fast-growing Indian megacities, including more than 13 million buildings and 80 million people. Our analysis reveals 878 km² of land subsiding, exposing ~1.9 million people to subsidence rates of more than 4 mm yr−1. An estimated 2,406 buildings across Delhi, Mumbai and Chennai are at high risk of structural damage from ongoing land subsidence. Sustained over 50 years, current subsidence rates could place as many as 23,529 buildings at very high risk of structural damage in Chennai, Delhi, Mumbai, Kolkata and Bengaluru. Our results highlight the compounding risk of infrastructure damage from subsidence, assisting policymakers to develop resilience plans and adaptation strategies that prioritize mitigation and maintenance spending. Building damage and collapse is an emerging problem, particularly in large cities in developing countries. Although engineering shortcomings are often blamed, land subsidence is an underappreciated culprit that could put tens of thousands of buildings at risk across Indian megacities.
建筑损坏是严重的安全隐患,在世界范围内造成巨大的经济损失。工程缺陷通常被认为是长期结构失效的原因,往往忽视了地面沉降的加剧作用。在这里,我们使用2015-2023年的卫星雷达观测数据来估计印度5个快速发展的特大城市的差异定居点,其中包括1300多万栋建筑和8000万人口。我们的分析显示,878平方公里的土地沉降,使190万人暴露在沉降率超过4毫米/年的环境中。在德里、孟买和金奈,估计有2406座建筑因持续的地面沉降而面临结构性破坏的高风险。在金奈、德里、孟买、加尔各答和班加罗尔,以目前的沉降速度持续50多年,可能会使多达23,529座建筑面临结构损坏的极高风险。我们的研究结果强调了下沉造成基础设施破坏的复合风险,有助于决策者制定恢复力计划和适应策略,优先考虑缓解和维护支出。建筑损坏和倒塌是一个新出现的问题,特别是在发展中国家的大城市。尽管工程缺陷经常被指责,但地面沉降是一个被低估的罪魁祸首,它可能使印度大城市成千上万的建筑物处于危险之中。
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引用次数: 0
Catalytic cascade depolymerization for sustainable recycling of waste polyvinyl chloride 催化级联解聚在废聚氯乙烯可持续回收中的应用
IF 27.1 1区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-10-28 DOI: 10.1038/s41893-025-01654-1
Yueshuang Mao, Pengfei Wang, Ruochen Cao, Ligang Wang, Bingnan Yu, Dongpeng Zhang, Wenfang Gao, Yueping Bao, Ding Ma, Sihui Zhan
The transition to a circular plastics economy is critical for mitigating plastic pollution and advancing global sustainability goals. As one of the most widely used synthetic polymers worldwide, the recycling of polyvinyl chloride (PVC) remains impeded by inefficient dechlorination and toxic chlorinated by-product formation. Here we show that a tailored LaFe0.3Al0.7O3 catalyst significantly enhances peroxymonosulfate activation to achieve stepwise PVC depolymerization. This system achieves complete conversion of PVC into CO2 and liquid organic products. Thus, valuable hydrocarbon compounds are obtained in high yields exceeding 90% among these liquids. Mechanistic studies reveal a cascade process: preferential chlorine removal mediated by singlet oxygen (1O2) followed by hydroxyl radical (⋅OH)-driven polymer backbone oxidation. The synergistic effect of 1O2 and ⋅OH resolves the key challenge of toxic by-products generated during dechlorination. A life-cycle assessment confirms that the process reduces carbon emissions by 45–99% and eco-costs by 51–99% across impact categories compared with conventional PVC waste treatment methods. Our approach enables the conversion of persistent waste plastics into valuable hydrocarbons through a safer and cleaner process with a notably reduced environmental footprints, thus opening opportunities for a more sustainable future. The authors demonstrate a Fenton-like chemistry activated by a perovskite catalyst to depolymerize PVC, one of the most widely used synthetic polymers, to value-added hydrocarbons in a stepwise manner.
向循环塑料经济过渡对于减轻塑料污染和推进全球可持续发展目标至关重要。聚氯乙烯(PVC)是世界上使用最广泛的合成聚合物之一,其回收利用仍然受到低效率脱氯和产生有毒氯化副产物的阻碍。本研究表明,定制的LaFe0.3Al0.7O3催化剂显著提高了过氧单硫酸盐的活性,从而实现了PVC的分步解聚。该系统实现了PVC完全转化为CO2和液态有机产品。因此,在这些液体中以超过90%的高收率获得有价值的碳氢化合物。机理研究揭示了一个级联过程:单重态氧(1O2)介导的氯优先去除,然后是羟基自由基(⋅OH)驱动的聚合物主链氧化。1O2和⋅OH的协同作用解决了脱氯过程中产生的有毒副产物的关键挑战。一项生命周期评估证实,与传统的PVC废物处理方法相比,该工艺在各种影响类别中减少了45-99%的碳排放,生态成本减少了51-99%。我们的方法能够通过更安全、更清洁的过程将持久性废塑料转化为有价值的碳氢化合物,同时显著减少环境足迹,从而为更可持续的未来创造机会。作者演示了一种由钙钛矿催化剂激活的芬顿类化学反应,以逐步解聚PVC(最广泛使用的合成聚合物之一),以增值碳氢化合物。
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引用次数: 0
Mapping mining areas in the tropics from 2016 to 2024 绘制2016年至2024年热带地区的矿区地图
IF 27.1 1区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-10-24 DOI: 10.1038/s41893-025-01668-9
Philipp Sepin, Lukas Vashold, Nikolas Kuschnig
Mining provides crucial materials for the global economy and the energy transition but can have severe environmental and social impacts. Available analyses of these impacts are limited by a lack of data on mining activity, particularly in the regions most affected. Here we present a detailed panel dataset mapping mining sites along the tropical belt from 2016 to 2024. Our approach uses a machine learning model, trained on over 25,000 mining polygons from the literature, to automatically segment mining areas with high-resolution (<5 m) satellite imagery. The dataset maps over 147,000 mining polygons that cover an average area of 66,400 km2 annually, with an accuracy of 87.7% and precision of 84.1%. Our approach allows accurate, precise and consistent delineation and can be scaled to other locations and periods. The dataset enables detailed analyses of local environmental, societal and economic impacts of mining in regions where conventional data are scarce or incomplete. Analysing the impacts of mining activities is hindered by scarce or incomplete data. Using a machine learning model, this study maps mining sites along the tropical belt from 2016 to 2024 with high accuracy and precision, and provides an approach that can be scaled to other locations and periods.
采矿为全球经济和能源转型提供了重要材料,但也可能产生严重的环境和社会影响。由于缺乏关于采矿活动的数据,特别是在受影响最严重的区域,对这些影响的现有分析受到限制。在这里,我们提供了一个详细的面板数据集,绘制了2016年至2024年热带矿区的地图。我们的方法使用机器学习模型,对文献中超过25,000个采矿多边形进行训练,以高分辨率(<5 m)卫星图像自动分割矿区。数据集绘制了14.7万多个矿区多边形,年平均覆盖面积为6.64万km2,精度为84.1%,精度为87.7%。我们的方法允许准确、精确和一致的描绘,并可以扩展到其他位置和时期。该数据集可以在传统数据稀缺或不完整的地区详细分析采矿对当地环境、社会和经济的影响。由于数据缺乏或不完整,对采矿活动影响的分析受到阻碍。本研究使用机器学习模型,以高精度和高精度绘制了2016年至2024年热带地区的采矿地点,并提供了一种可以扩展到其他地点和时期的方法。
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引用次数: 0
Crop water origins and hydroclimate vulnerability of global croplands 全球农田水分来源与水文气候脆弱性
IF 27.1 1区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-10-24 DOI: 10.1038/s41893-025-01662-1
Yan Jiang, Jennifer A. Burney
Water availability critically influences crop phenology and agricultural productivity. Here we use satellite-derived water isotope observations and physical models to trace atmospheric moisture origins for major global rain-fed crops from 2003 to 2019, distinguishing between oceanic and terrestrial sources. Our analysis shows that the fraction of rainwater originating from land (f) varies both geographically and seasonally, with an important threshold at ~36%. Regions with higher f, that is, more dependent on land-originating water, are more prone to insufficient rainwater supply and soil moisture deficits during the main growing season. Crops in these regions show higher sensitivity to hydroclimate—with reduced productivity in lower-rainfall years—and a higher likelihood of drought. Notably, more than 40% of global maize and 60% of winter wheat is grown in regions where rainfall depends heavily on land-originating moisture (f ≥ 36%), underscoring the vulnerability of key staple crops to hydroclimate stress. Our results highlight the importance of managing local land moisture sources and reveal where targeted water management strategies would be most expected to enhance agricultural resilience. The origin of precipitation from oceanic or terrestrial moisture sources influences the stability of agricultural rainwater supply. Nearly half of global maize and wheat-growing regions receive a substantial share of rainfall from terrestrial water sources and are at greater risk of water scarcity.
水分的有效性对作物物候和农业生产力有重要影响。在这里,我们使用卫星衍生的水同位素观测和物理模型来追踪2003年至2019年全球主要雨养作物的大气水分来源,区分海洋和陆地来源。我们的分析表明,来自陆地的雨水的比例(f)在地理上和季节上都有变化,一个重要的阈值为~36%。f值较高的地区,即更依赖陆源水的地区,在主要生长季节更容易出现雨水供应不足和土壤水分亏缺。这些地区的作物对水文气候表现出更高的敏感性——在降雨较少的年份,产量会下降——干旱的可能性也更高。值得注意的是,全球40%以上的玉米和60%的冬小麦生长在降雨严重依赖陆地水分的地区(f≥36%),这凸显了主要主粮作物对水文气候胁迫的脆弱性。我们的研究结果强调了管理当地土地水分来源的重要性,并揭示了最有希望提高农业恢复力的针对性水资源管理战略。来自海洋或陆地湿源的降水影响农业雨水供应的稳定性。全球近一半的玉米和小麦种植区从陆地水源获得大量降雨,面临更大的缺水风险。
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引用次数: 0
Treading on fragile ground 踩在脆弱的地面上
IF 27.1 1区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-10-21 DOI: 10.1038/s41893-025-01674-x
Wild and remote, Antarctica and the Arctic are drawing in record numbers of tourists from around the globe, with environmental effects following in their wake. Proactive policies and careful management are needed to save the Earth’s poles from their growing popularity.
荒凉而偏远的南极和北极吸引了来自世界各地创纪录数量的游客,随之而来的是环境影响。积极的政策和谨慎的管理是拯救地球两极免受其日益普及的需要。
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引用次数: 0
Global hotspots of industrial chlorinated and brominated polycyclic aromatic hydrocarbon emissions 全球工业氯代和溴代多环芳烃排放热点
IF 27.1 1区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-10-21 DOI: 10.1038/s41893-025-01666-x
Emissions data and machine learning are used to compile a global inventory of industrial chlorinated and brominated polycyclic aromatic hydrocarbon emissions from 11 sectors across 184 countries in 2018. Emission hotspots are concentrated in Oceania, East Asia and Latin America, with iron ore sintering identified as the dominant source, accounting for about 86% of total emissions.
排放数据和机器学习用于编制2018年184个国家11个行业的工业氯化和溴化多环芳烃排放全球清单。排放热点集中在大洋洲、东亚和拉丁美洲,其中铁矿石烧结为主要来源,约占总排放量的86%。
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引用次数: 0
Price sensitivity to precipitation and water storage in California 价格对加州降水和储水量的敏感性
IF 27.1 1区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-10-21 DOI: 10.1038/s41893-025-01659-w
Madeline Turland, Colin A. Carter, Bulat Gafarov, Jens Hilscher, Katrina Jessoe
Climate change will reshape global demand and supply for water. Surface water supplies will become more variable, and warming temperatures may increase demand for water. These changes could impose substantial economic costs. Well-functioning water markets can mitigate some of these costs by allocating water to those who value it most. However, storage constraints limit the ability of markets to transfer water over time. Here we use transactions data from 2010 to 2022 to evaluate how water prices in California’s surface and groundwater markets respond to precipitation shocks, and how this response varies with inventory levels and water storage capacity. In groundwater markets, with high inventories, prices are unresponsive to precipitation shocks. In surface water markets, with limited inventories, prices increase strongly when precipitation declines. A 50-inch decrease in annual precipitation, typical when comparing deluge with drought in California, increases the price by US$487 per acre-foot, more than tripling compared with the average wet year. This effect is less pronounced when inventory levels are higher. Increasing storage through the joint management of groundwater and surface water supplies could provide a pathway to reduce the adverse consequences of climate-induced precipitation volatility. This study examines the relationship between water inventories and price dynamics in California’s surface and groundwater markets over 2010–2022 and shows that price fluctuations in surface water markets are tied to precipitation shocks, whereas prices in groundwater markets remain stable over time.
气候变化将重塑全球对水的需求和供应。地表水供应将变得更加多变,气温升高可能会增加对水的需求。这些变化可能带来巨大的经济成本。运转良好的水市场可以通过将水分配给最看重它的人来减轻其中的一些成本。然而,储存的限制限制了市场随着时间的推移转移水的能力。在这里,我们使用2010年至2022年的交易数据来评估加州地表水和地下水市场的水价如何响应降水冲击,以及这种响应如何随库存水平和储水能力而变化。在地下水库存高的市场,价格对降水冲击反应迟钝。在地表水市场,由于库存有限,当降水减少时,价格会大幅上涨。年降水量减少50英寸,这是比较加州洪水和干旱的典型情况,每英亩英尺的价格会上涨487美元,是平均多雨年份的三倍多。当库存水平较高时,这种影响不那么明显。通过联合管理地下水和地表水供应来增加储水量,可以为减少气候引起的降水波动的不利后果提供一条途径。本研究考察了2010-2022年加州地表水和地下水市场的水库存与价格动态之间的关系,并表明地表水市场的价格波动与降水冲击有关,而地下水市场的价格则随时间保持稳定。
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引用次数: 0
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Nature Sustainability
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