A comprehensive study led by the UK Centre for Ecology & Hydrology (UKCEH), in collaboration with Ukrainian and Dutch scientists, reveals that the balance between nutrient removal and input has been skewed dramatically. Ukraine’s rich agricultural landscapes, historically sustained through consistent fertilisation, now suffer from a deficit as the supply of synthetic fertilisers diminishes. Fertiliser scarcity arises not only from wartime logistics challenges but also from inefficiencies in nutrient management on the ground, compounded by the direct physical damage wrought by military operations, including soil erosion and contamination.

Published in the journal Communications Earth & Environment, the study utilises 40 years of official fertiliser usage and crop yield data to chart nutrient flows related to wheat, maize, and sunflower cultivation. These three staple crops, which make up two-thirds of Ukraine’s agricultural output, anchor the country’s export economy, especially sunflower oil—a product for which Ukraine ranks as the world’s top producer. The findings expose a troubling nutrient asymmetry; more minerals are harvested and exported than are replaced, locking the country into a cycle of soil degradation that threatens future harvests and global food security.

The core issue lies in both input insufficiency and imbalanced application. During the Soviet era, fertiliser use was excessive, leading to nutrient runoff and environmental damage. However, since independence, a steep decline in phosphorus and potassium fertiliser use—mostly imported—has left soils critically deficient. In contrast, nitrogen fertiliser application, once reduced, surged again due to domestic production but was uneven and often excessive regionally. The war’s impact has since caused a sharp decline across all nutrient applications, plunging Ukraine’s soils into deficit territory.

Addressing this crisis requires a nuanced, integrated nutrient management framework. Dr Sergiy Medinets, leading the investigation, underscores the necessity of balancing synthetic and organic fertiliser use, incorporating animal manure, and adopting crop rotations that include legumes. Legumes naturally capture atmospheric nitrogen, enriching soils sustainably. This approach not only restores nutrient levels but also mitigates environmental harm caused by fertiliser overuse, such as groundwater contamination and air pollution from nitrogen compounds.

Soil nutrient management has long been complicated by the separation of livestock and crop operations across Ukraine. The decline in livestock numbers has minimized farmers’ access to animal manure, a valuable organic fertiliser, with an estimated 90% of manure produced currently wasted. This represents a multi-billion-dollar loss in fertiliser value and a missed opportunity for sustainable agricultural rejuvenation.

Revitalising the synergy between crop and livestock farming systems is a key recommendation. The study advocates for localized manure collection and redistribution systems that enable farms lacking livestock to benefit from organic inputs. Alongside this, precision applications of fertilisers—both synthetic and organic—are essential to optimize nutrient use efficiency, minimizing environmental losses and reducing costs for producers.

Further innovations include establishing a detailed national inventory quantifying nutrient removals by various crops, forming the basis for ‘smart fertiliser planners.’ These digital tools would empower farmers with tailored nutrient management plans, ensuring precise application rates that meet crop demands without excess.

The global implications of Ukraine’s agricultural decline are profound. As a critical supplier of wheat, maize, and sunflower products, Ukraine’s diminished production could trigger food insecurity and price escalations, especially in import-dependent regions such as North Africa and the Middle East. Maintaining soil fertility is thus not merely a national concern but a pivotal element of global food systems resilience.

International cooperation and support will be indispensable. The study calls for financial assistance through mechanisms like the Ukraine Recovery and Reconstruction Fund to facilitate investments in machinery for efficient fertiliser application and facilities for manure handling and storage. Cross-border knowledge exchanges and capacity-building initiatives could accelerate the adoption of best practices among Ukrainian farmers.

This crisis, set against a background of geopolitical turmoil, serves as a stark reminder that agricultural sustainability hinges on more than just land and climate. It demands a meticulous balance of soil chemistry, technological innovation, and integrated management—elements now threatened by conflict but recoverable with informed, coordinated action.

With these measures, Ukraine can not only protect but rejuvenate its vital croplands, securing its position as a global agricultural powerhouse. This requires urgency, innovation, and solidarity, both within Ukrainian borders and across the international community, as the interplay of environment, economy, and geopolitics continues to evolve.

Subject of Research: The sustainability of Ukrainian agriculture in the context of soil nutrient depletion exacerbated by war and nutrient management challenges.

Article Title: Nutrient asymmetry challenges the sustainability of Ukrainian agriculture

News Publication Date: 4-Nov-2025

Web References:
https://doi.org/10.1038/s43247-025-02826-9

Image Credits: Sergiy Medinets

Keywords: Agriculture, Crop science, Crop production, Crop yields, Food crops, Wheat, Fertilizers, Nutrients, Sustainable agriculture, Phosphorus, Potassium, Nitrogen, Pollution

Methane, a hydrocarbon gas roughly 25 times more effective at trapping heat in the atmosphere than carbon dioxide over a 100-year timescale, has conventionally been attributed primarily to rural activities, including agriculture, wetlands, and natural gas extraction. Urban methane emissions, by contrast, have historically been considered relatively minor in comparison. This assumption has shaped environmental monitoring and emission mitigation strategies globally. However, the intense warfare between Russia and Ukraine challenges this long-standing paradigm by revealing that urban environments under siege can become unexpectedly prolific sources of methane.

Leveraging cutting-edge satellite-constellation technology, the research team conducted a systematic assessment of methane emissions linked directly to wartime disruptions in urban landscapes. These constellations, comprised of multiple satellites equipped with highly sensitive sensors, offer unparalleled spatial and temporal resolution for detecting methane plumes. By synchronizing data from a constellation framework, the researchers bypassed the limitations of single-satellite observations, which often fail to capture transient or highly localized emission events characteristic of conflict zones.

The results are as startling as they are illuminating. Prior to the commencement of intensive hostilities, methane emissions from urban centers in the affected region amounted to roughly just 21% of the levels observed in surrounding rural areas. This disparity aligned with conventional expectations, reflecting the lower prevalence of methane-generating activities in urban environments. However, even after a relatively small number of military strikes, urban methane levels surged to rival those emanating from rural landscapes. Under conditions of protracted and intensified warfare, emissions from cities catastrophically eclipsed rural sources, skyrocketing to between 146% and 588% of rural methane levels.

Such a transformative shift underscores the profound vulnerability of urban infrastructures during wartime. Unlike rural methane sources, largely driven by diffuse natural and agricultural processes, urban methane emissions during conflict are frequently tied to direct damage or destruction of man-made infrastructures. Chief among these are residential buildings, whose partial collapses, heating system ruptures, and inadvertent gas leaks become significant emission points. Crucially, residential structures have been identified as rivaling military installations not only in the volumetric intensity of methane released but also in the frequency with which they emit these dangerous gases.

This dual role of civilian infrastructure complicates traditional narratives that separate military and non-military impacts in conflict zones. The pervasive damage to cityscapes fundamentally alters the methane emission landscape. Damage to heating, gas, and sewage infrastructure, once sealed within functional urban utilities, suddenly becomes exposed, inefficient, and prone to uncontrolled gas release. Additionally, military targets themselves—such as weapons depots, fuel storage facilities, and vehicular assets—emit methane upon destruction, but the interconnected nature of urban residential and commercial infrastructure amplifies total emissions far beyond those strictly from military sources.

Moreover, the study’s findings highlight a critical blind spot in global methane monitoring networks. Conflict zones, especially active urban battlefields, have long been challenging environments for environmental surveillance, due to safety concerns, communication disruptions, and restricted on-the-ground access. Satellite constellations represent a technological breakthrough in overcoming these challenges, enabling near real-time tracking of methane plumes emanating from affected cities. Such monitoring not only quantifies the greenhouse gas footprint of warfare but also facilitates timely intervention strategies to mitigate further environmental deterioration.

The implications of this work extend deeply into climate science and international environmental policy. Methane’s high global warming potential means that episodic spikes in emissions, such as those induced by warfare, can have outsized effects on atmospheric composition and temperature trajectories. The Russia–Ukraine conflict’s urban methane surge thus adds a hitherto underestimated source of greenhouse gases to the global inventory. This insight demands integrating conflict-related emissions into climate models and devising responsive frameworks that incorporate geopolitical stability as a factor in achieving sustainability goals.

Equally significant is the study’s contribution to the discourse surrounding sustainable development in conflict-affected regions. Internationally recognized frameworks, including the United Nations Sustainable Development Goals (SDGs), explicitly link peace, environmental protection, and climate action. By elucidating the hidden environmental cost of urban warfare, the research reinforces peace as not merely a humanitarian imperative but also a necessary condition for effective climate stewardship. Without cessation of hostilities, mitigation efforts in war-torn regions remain futile, perpetuating a cycle of environmental degradation with global repercussions.

Delving into methodological rigor, the satellite-constellation approach capitalizes on synergistic data fusion from multiple orbits to isolate urban methane plumes against the complex atmospheric background. This is particularly critical in war zones where emissions are highly episodic and spatially heterogeneous. Advanced algorithms process multispectral imagery and spectrometric readings to identify methane’s distinct spectral signature, discounting confounders such as moisture, dust, or other aerosols. The resulting spatially explicit emission maps enable differentiation between urban and rural sources with unprecedented clarity.

Analyses reveal that urban methane emissions correlate strongly with the intensity and frequency of attacks. Early-stage conflict, characterized by targeted strikes and limited infrastructure disruption, already induces a measurable elevation in urban emissions. As warfare escalates and urban areas suffer sustained bombardment, the emissions scale nonlinearly, reflecting cumulative destruction and the breakdown of critical urban systems. This relationship underscores urban infrastructure’s sensitivity and its pace of degradation under prolonged conflict conditions.

Additionally, the findings challenge preconceived assumptions that military installations represent the predominant methane sources during wars. While such facilities undeniably contribute due to fuel storage and chemical stockpiles, their overall emission impact is matched by civilian infrastructure. This revelation spotlights the non-combatant environment’s susceptibility and the inadvertent environmental toll borne by residential zones, exacerbating humanitarian concerns with parallel ecological crises.

The research also sheds light on temporal dynamics, showing that methane emissions do not simply spike momentarily post-strike but can persist, sustained by ongoing infrastructural impairment and inadequate repair capacities in warzones. This enduring emission trajectory posits urban methane in active conflicts as a chronic environmental hazard rather than a transitory phenomenon, necessitating long-term environmental surveillance strategies post-conflict.

From a policy perspective, integrating these insights compels a reevaluation of environmental risk assessments in military engagements. Peacekeeping and conflict resolution efforts must increasingly consider environmental ramifications as integral to broader security agendas. Furthermore, incorporating methane emission monitoring into international arms and conflict impact reporting may provide a novel tool for assessing war’s broader planetary footprint.

The technological leap achieved through satellite constellation monitoring heralds a future where environmental impacts of human conflict can be measured with fine granularity and immediacy. This capability forms the basis for potential early warning systems capable of detecting not only conventional security threats but also their hidden environmental dimensions. The approach points towards integrated environmental conflict monitoring as an indispensable field for scientific advancement and policy innovation in a world facing both geopolitical strife and climate crisis.

Ultimately, this pioneering work situates methane emissions from urban warfare at the forefront of interdisciplinary concern—where climate science, urban studies, conflict analysis, and environmental justice converge. By exposing the invisible greenhouse gas footprints imprinted on cities caught in battle, it prompts a profound reconsideration of war’s collateral impacts, advocating for peace not only as a moral imperative but as a foundational aspect of planetary health preservation.

Subject of Research:
Methane emissions attributable to urban warfare during the Russia–Ukraine conflict.

Article Title:
Vast and hidden urban methane emissions from the Russia–Ukraine war.

Article References:
Feng, Z., Hu, R., Pan, Y. et al. Vast and hidden urban methane emissions from the Russia–Ukraine war. Nat Cities (2025). https://doi.org/10.1038/s44284-025-00309-8

Image Credits:
AI Generated