Vera I. Slaveykova- Environmental Biogeochemistry and Ecotoxicology, Department F.-A. Forel for Environmental and Aquatic Sciences, Faculty of Sciences, and Institute for Environmental Sciences, University of Geneva, Geneva, Switzerland
Anthropogenic activities increasingly alter Earth’s biogeochemical cycles, threatening the integrity and resilience of critical planetary systems. This perspective paper highlights the pivotal role of biogeochemical cycles in global sustainability challenges such as climate change, biodiversity loss, land degradation, and water scarcity, underlining feedbacks that exacerbate ecosystem degradation and diminish Earth’s self-regulating capacity. Advances in integrated Earth system models demonstrate the necessity of capturing nutrient interactions to accurately predict ecosystem productivity and carbon sequestration, particularly under nutrient-limited conditions. The emergence of novel entities introduces unprecedented vulnerabilities to elemental cycles, with their long-term impacts and planetary boundary exceedances still poorly understood. These challenges, coupled with nutrient boundary exceeding and ongoing climate change, regional variability and nonlinear and cascading responses emphasize an urgent need for interdisciplinary research, enhanced monitoring, and robust regulatory frameworks, supported by advances in modeling, big data analytics, and artificial intelligence.
Introduction
Understanding Earth as an integrated physical, chemical, and biological system, and the consequences of human-induced disturbances is at the core of modern biogeosciences (Steffen et al., 2020). Biogeochemistry deals with how elements circulate through the atmosphere, biosphere, hydrosphere, and lithosphere, sustaining life and regulating planetary processes. This understanding is increasingly vital as climate change and different anthropogenic pressures accelerate. The Biogeochemical Dynamics section of Frontiers in Environmental Science, launched in 2019, offers a dedicated platform for advancing knowledge on the complex interactions among biological, geological, and chemical processes (Slaveykova, 2019). As we progress through the 21st century, this multidisciplinary section stands at the forefront of disseminating cutting-edge scientific knowledge and impactful discoveries in the field of biogeochemistry to researchers, industry, policymakers, and the public worldwide. Wide spectrum of research topics spans from greenhouse gasses, such as methane cycling (McGinnis et al., 2023) to ecological risks posed anthropogenic particles (Mitrano et al., 2021), from distinct dynamics of biogeochemical cycling within wetland (Rezanezhad et al., 2020) to urban systems (Mitchell et al., 2023) and cold regions in transition (Rezanezhad et al., 2023).
But what’s ahead signals growing concern: the integrity of Earth’s biogeochemical cycles is increasingly threatened by anthropogenic activities, which are altering the natural flow, transformation, and storage of essential elements across atmospheric, terrestrial, and aquatic systems (Bertrand and Legendre, 2021; Ciais et al., 2014; Friedlingstein et al., 2025). These alterations have far-reaching consequences, intersecting with major global sustainability challenges, including climate change, land degradation, biodiversity loss, and water scarcity (Fletcher et al., 2024; Lenton et al., 2008; Lieu et al., 2025; Wang et al., 2024). Big data analyses confirmed widespread planetary decline but also highlight areas of resilience and recovery (Runting et al., 2020).
Climate change is both a driver and consequence of biogeochemical cycle disruption (Friedlingstein et al., 2025). As warming intensifies, interactions between the C, N, and P are expected to become more dynamic potentially reshaping ecosystem processes in complex ways (Luo et al., 2022; Menge et al., 2023; Zhang et al., 2020; Zuccarini et al., 2023). However, the direction and scale of these changes remain uncertain, as biogeochemical responses vary across systems (Cui et al., 2025). The interconnection of C, N, P, and other elemental cycles means perturbations can cascade, complicating predictions and management efforts (Gruber and Galloway, 2008). Simultaneously, land degradation, often exacerbated by unsustainable land-use practices, has led to altered soil nutrient dynamics and declining ecosystem productivity, further weakening biogeochemical resilience (Amelung et al., 2020; Burrell et al., 2020; Gibbs and Salmon, 2015). Biogeochemical imbalances also underlie the ongoing global biodiversity crisis. Imbalance of global nutrient cycles exacerbated by the greater retention of P over N potentially leading to biodiversity losses within lakes and algal blooms in downstream N-limited coastal zone (Wu et al., 2022). Nutrient enrichment from agricultural runoff, such as excess N and P, disrupts aquatic food webs and contributes to hypoxic zones and species loss in freshwater and coastal systems (Devlin and Brodie, 2023). Conversely, diverse plant and microbial communities’ buffer against nutrient losses by enhancing element retention and recycling. They degrade the natural capacity of ecosystems to regulate essential and toxic elements, with cascading effects on climate, water quality, and food security. Preserving and restoring biodiversity—especially in soils—is critical for maintaining stable and resilient biogeochemical cycles. Moreover, water scarcity and declining water quality are deeply connected to alterations in the hydrological and geochemical cycling of both nutrients and pollutants, especially in regions undergoing rapid climate and land-use change (Akhtar et al., 2021).
What is the Earth capacity to support disruptions to biogeochemical cycles due to the anthropogenic activities without crossing critical thresholds? This is a key question in biogeochemical dynamics research because Earth’s systems operate within finely balanced thresholds, and exceeding limits can trigger cascading effects (Rockström et al., 2024b). The planetary boundaries framework (Rockström et al., 2009; Steffen et al., 2015) identifies nine Earth system processes with proposed “safe operating spaces”. This framework allows define safe limits for the elements of Earth’s biogeochemical cycle and assess the stability of Earth’s life-support system. Among the nine identified boundaries, biogeochemical flows of N and P, along with C (through climate change) cycle disturbance, have emerged as some of the most severely stressed (Richardson et al., 2023). These cycles underpin core ecosystem functions, such as primary productivity, soil fertility, and water quality.
Biogeochemical cycles are tightly interconnected, and their interactions critically shape ecosystem productivity and resilience. Yet many Earth system models still simulate these cycles in isolation, missing key feedback and nutrient co-limitations. Recent modeling advances, such as the dynamic land ecosystem model, show that coupling C, N, and P cycles significantly improves predictions of carbon sequestration, especially under phosphorus-limited conditions in tropical ecosystems (Wang et al., 2020). This emphasizes the need for integrated models that reflect the complex interdependencies among elemental cycles. Integrating micronutrient dynamics into Earth system models is also essential for accurately predicting ecosystem responses to global change. In marine systems, nutrients like Fe, Mn, Zn, and Co are vital for phytoplankton and carbon cycling (Tittensor et al., 2021) but are often underrepresented. Modeling shows that climate-driven changes, such as ocean stratification, can disrupt micronutrient availability and affect primary production (Bian et al., 2023).
Biogeochemical dynamics is characterized by non-linear interactions, feedback loops, and cross-scale processes, which represent a challenge for predictive ecological modeling (Jones et al., 2024). Traditional process-based models, while indispensable, often struggle to integrate high-dimensional, heterogeneous data streams in ways that capture emergent patterns across Earth system boundaries (Jones et al., 2024). In such context, artificial intelligence (AI) offers promise for tracking, pattern recognition, and forecasting (Gupta et al., 2023; Irrgang et al., 2021), as well as for quantifying safe operating spaces and helping reduce risks to human and planetary health (Rockstroem et al., 2023). This aligns with the One Health concept, which emphasizes integrated approach across environmental, animal, and human health (Pitt and Gunn, 2024). However, the full potential of AI in this field is still emerging. It was highlighted that transforming existing process-based models into neural network-based tools could enable predictive insights into key ecological processes, harnessing the full potential of the big data revolution (Alexandrov, 2025).
Recent inclusion of novel entities, including synthetic chemicals, plastics, pharmaceuticals, nanomaterials added a new dimension to biogeochemical “vulnerability” of the Earth system (Persson et al., 2022). For instance the persistence and global spread of four selected per- and polyfluoroalkyl substances (PFAS) in the atmosphere has led to the planetary boundary for chemical pollution being exceeded (Cousins et al., 2022). Unlike traditional pollutants, novel entities do not cycle through the environment in predictable or reversible ways, and their long-term impacts on global biogeochemical processes are still poorly understood. Their persistence and interactions with elemental cycles remain poorly understood and largely under-investigated. A recent study has demonstrated that the plastic pollution exacerbated all planetary boundaries (Villarrubia-Gómez et al., 2024). Understanding the influence of novel entities on biogeochemical cycles remains thus a critical frontier in environmental science.
Together, the overshoot of nutrient boundaries and the rise of persistent novel entities signal that the planet’s buffering capacity is nearing critical limits. Addressing these interlinked threats demands not only limiting excess nutrient flows but also investing in early detection, monitoring, and regulation of novel substances. Interdisciplinary research is urgently needed to define safe exposure thresholds and understand how these emerging stressors interact with global element cycles under accelerating climate change. Furthermore, very recent study revealed that even under optimistic scenario with strong environmental policy measures, critical boundaries, in particularly those related to climate change, biogeochemical cycles, and biodiversity, are projected to remain exceeded by 2050 due to systemic inertia and delayed responses (van Vuuren et al., 2025).
Recent advances have improved quantification of planetary boundaries, yet significant uncertainties remain, particularly regarding regional variability and nonlinear responses in coupled biogeochemical cycles (Schulte-Uebbing et al., 2022) and crucial to defining safe operating spaces that balance human development with Earth system stability (Gupta et al., 2023). Understanding these thresholds is essential for shaping effective environmental policies, guiding mitigation strategies, and building resilience in socio-ecological systems (Rockström et al., 2024a). Research emphasizes the link between societal tipping points and ecological tipping points and highlight the necessity of unified understanding of the Earth by integrating physical components (atmosphere, cryosphere, land, ocean, lithosphere) with human and social processes (Lam and Rousselot, 2024). Bridging science and policy require integrated nutrient monitoring systems, institutional reform to enable cross-sector collaboration, and inclusion of social sciences to leverage behavioral change. Strengthening local governance is also essential for equitable, context-specific solutions. However, translating this knowledge into effective governance remains a major challenge (Rockstroem et al., 2023). Governance tools for integrating land use, water management, and climate action are still fragmented. Integrated policy frameworks and technology-enabled monitoring, such as AI and satellite tools, are critical for real-time tracking of nutrient flows and emissions. Additionally, stronger regulation of novel chemical entities is needed to prevent accumulation and long-term ecological harm.
Looking ahead, biogeochemical cycles will encounter multifaceted and interdependent challenges necessitating integrative scientific and policy approaches. While current understanding acknowledges that Earth’s capacity is finite and under strain, there is urgent need for more spatially resolved, process-based insights. The biogeochemistry community is actively working on refining models, identifying thresholds, and providing actionable knowledge to avoid irreversible ecological change. The forthcoming decade represents a pivotal period for advancing scientific understanding and policy implementation to prevent ecological overshoot and to navigate toward sustainability.
Data availability statement
The original contributions presented in the study are included in the article/supplementary material, further inquiries can be directed to the corresponding author.
Author contributions
VS: Writing – review and editing, Writing – original draft, Investigation, Project administration, Conceptualization.
Funding
The author declares that no financial support was received for the research and/or publication of this article.
Conflict of interest
The author declares that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
The author(s) declared that they were an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision.
Generative AI statement
The author declares that no Generative AI was used in the creation of this manuscript.
Publisher’s note
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.
References
Akhtar, N., Syakir Ishak, M. I., Bhawani, S. A., and Umar, K. (2021). Various natural and anthropogenic factors responsible for water quality degradation: a review. Water 13 (19), 2660. doi:10.3390/w13192660
Alexandrov, G. A. (2025). When does artificial intelligence replace process-based models in ecological modelling? Ecol. Model. 499, 110923. doi:10.1016/j.ecolmodel.2024.110923
Amelung, W., Bossio, D., de Vries, W., Kögel-Knabner, I., Lehmann, J., Amundson, R., et al. (2020). Towards a global-scale soil climate mitigation strategy. Nat. Commun. 11 (1), 5427. doi:10.1038/s41467-020-18887-7
Bertrand, P., and Legendre, L. (2021). The global Earth system: present and future, Earth, our living planet: the Earth system and its Co-evolution with organisms. Cham: Springer International Publishing, 507–560. doi:10.1007/978-3-030-67773-2_11
Bian, V., Cai, M., and Follett, C. L. (2023). Understanding opposing predictions of prochlorococcus in a changing climate. Nat. Commun. 14 (1), 1445. doi:10.1038/s41467-023-36928-9
Burrell, A. L., Evans, J. P., and De Kauwe, M. G. (2020). Anthropogenic climate change has driven over 5 million km2 of drylands towards desertification. Nat. Commun. 11 (1), 3853. doi:10.1038/s41467-020-17710-7
Ciais, P., Dolman, A. J., Bombelli, A., Duren, R., Peregon, A., Rayner, P. J., et al. (2014). Current systematic carbon-cycle observations and the need for implementing a policy-relevant carbon observing system. Biogeosciences 11 (13), 3547–3602. doi:10.5194/bg-11-3547-2014
Cousins, I. T., Johansson, J. H., Salter, M. E., Sha, B., and Scheringer, M. (2022). Outside the safe operating space of a new planetary boundary for Per- and polyfluoroalkyl substances (PFAS). Environ. Sci. and Technol. 56 (16), 11172–11179. doi:10.1021/acs.est.2c02765
Cui, Y. X., Peng, S. S., Rillig, M. C., Camenzind, T., Delgado-Baquerizo, M., Terrer, C., et al. (2025). Global patterns of nutrient limitation in soil microorganisms. Proc. Natl. Acad. Sci. U. S. A. 122 (20), e2424552122. doi:10.1073/pnas.2424552122
Devlin, M., and Brodie, J. (2023). “Nutrients and eutrophication,” in Marine pollution – monitoring, management and mitigation. Editor A. Reichelt-Brushett (Switzerland, Cham: Springer Nature), 75–100. doi:10.1007/978-3-031-10127-4_4
Fletcher, C., Ripple, W. J., Newsome, T., Barnard, P., Beamer, K., Behl, A., et al. (2024). Earth at risk: an urgent call to end the age of destruction and forge a just and sustainable future. PNAS Nexus 3 (4), pgae106. doi:10.1093/pnasnexus/pgae106
Friedlingstein, P., O'Sullivan, M., Jones, M. W., Andrew, R. M., Hauck, J., Landschützer, P., et al. (2025). Global carbon budget 2024. Earth Syst. Sci. Data 17 (3), 965–1039. doi:10.5194/essd-17-965-2025
Gibbs, H. K., and Salmon, J. M. (2015). Mapping the world's degraded lands. Appl. Geogr. 57, 12–21. doi:10.1016/j.apgeog.2014.11.024
Gruber, N., and Galloway, J. N. (2008). An Earth-system perspective of the global nitrogen cycle. Nature 451 (7176), 293–296. doi:10.1038/nature06592
Gupta, J., Liverman, D., Prodani, K., Aldunce, P., Bai, X., Broadgate, W., et al. (2023). Earth system justice needed to identify and live within Earth system boundaries. Nat. Sustain. 6 (6), 630–638. doi:10.1038/s41893-023-01064-1
Irrgang, C., Boers, N., Sonnewald, M., Barnes, E. A., Kadow, C., Staneva, J., et al. (2021). Towards neural Earth system modelling by integrating artificial intelligence in Earth system science. Nat. Mach. Intell. 3 (8), 667–674. doi:10.1038/s42256-021-00374-3
Jones, C. G., Adloff, F., Booth, B. B. B., Cox, P. M., Eyring, V., Friedlingstein, P., et al. (2024). Bringing it all together: science priorities for improved understanding of Earth system change and to support international climate policy. Earth Syst. Dynam. 15 (5), 1319–1351. doi:10.5194/esd-15-1319-2024
Lam, V., and Rousselot, Y. (2024). Anthropocene, planetary boundaries and tipping points: interdisciplinarity and values in Earth system science. Eur. J. Philosophy Sci. 14 (2), 18. doi:10.1007/s13194-024-00579-4
Lenton, T. M., Held, H., Kriegler, E., Hall, J. W., Lucht, W., Rahmstorf, S., et al. (2008). Tipping elements in the earth's climate system. Proc. Natl. Acad. Sci. 105 (6), 1786–1793. doi:10.1073/pnas.0705414105
Lieu, J., Mangalagiu, D., Martínez-Reyes, A., and Sarrica, M. (2025). Just social-ecological tipping scales: a mid-range social theory of change in coal and carbon intensive regions. Glob. Environ. Change 92, 103000. doi:10.1016/j.gloenvcha.2025.103000
Luo, M., Moorhead, D. L., Ochoa-Hueso, R., Mueller, C. W., Ying, S. C., and Chen, J. (2022). Nitrogen loading enhances phosphorus limitation in terrestrial ecosystems with implications for soil carbon cycling. Funct. Ecol. 36 (11), 2845–2858. doi:10.1111/1365-2435.14178
McGinnis, D. F., Prairie, Y. T., Grossart, H.-P., and DelSontro, T. (2023). Editorial: sources, sinks, and emissions in aquatic systems: the past, present, and future under global change. Front. Environ. Sci. 11, 11–2023. doi:10.3389/fenvs.2023.1218878
Menge, D. N. L., Kou-Giesbrecht, S., Taylor, B. N., Akana, P. R., Butler, A., Pereira, K. A. C., et al. (2023). Terrestrial phosphorus cycling: responses to climatic change. Annu. Rev. Ecol. Evol. Syst. 54, 429–449. doi:10.1146/annurev-ecolsys-110421-102458
Mitchell, C. P. J., Oswald, C. J., and Ledford, S. H. (2023). Editorial: biogeochemical dynamics in urban systems: interactions, feedbacks and cumulative effects. Front. Environ. Sci. 11, 11–2023. doi:10.3389/fenvs.2023.1338537
Mitrano, D. M., Praetorius, A., Lespes, G., and Slaveykova, V. I. (2021). Editorial: biogeochemistry of anthropogenic particles. Front. Environ. Sci. 9, 9–2021. doi:10.3389/fenvs.2021.667140
Persson, L., Carney Almroth, B. M., Collins, C. D., Cornell, S., de Wit, C. A., Diamond, M. L., et al. (2022). Outside the safe operating space of the planetary boundary for novel entities. Environ. Sci. and Technol. 56 (3), 1510–1521. doi:10.1021/acs.est.1c04158
Pitt, S. J., and Gunn, A. (2024). The one health concept. Br. J. Biomed. Sci. 81, 12366. doi:10.3389/bjbs.2024.12366
Rezanezhad, F., Bieroza, M., Contosta, A., and Van Cappellen, P. (2023). Editorial: the cold regions in transition: impacts on soil and groundwater biogeochemistry. Front. Environ. Sci. 11, 11–2023. doi:10.3389/fenvs.2023.1143388
Rezanezhad, F., McCarter, C. P. R., and Lennartz, B. (2020). Editorial: wetland biogeochemistry: response to environmental change. Front. Environ. Sci. 8, 8–2020. doi:10.3389/fenvs.2020.00055
Richardson, K., Steffen, W., Lucht, W., Bendtsen, J., Cornell, S. E., Donges, J. F., et al. (2023). Earth beyond six of nine planetary boundaries. Sci. Adv. 9 (37), eadh2458. doi:10.1126/sciadv.adh2458
Rockstroem, J., Gupta, J., Qin, D. H., Lade, S. J., Abrams, J. F., Andersen, L. S., et al. (2023). Safe and just Earth system boundaries. Nature 619 (7968), 102–111. doi:10.1038/s41586-023-06083-8
Rockström, J., Donges, J. F., Fetzer, I., Martin, M. A., Wang-Erlandsson, L., and Richardson, K. (2024a). Planetary boundaries guide humanity’s future on Earth. Nat. Rev. Earth and Environ. 5 (11), 773–788. doi:10.1038/s43017-024-00597-z
Rockström, J., Kotzé, L., Milutinović, S., Biermann, F., Brovkin, V., Donges, J., et al. (2024b). The planetary commons: a new paradigm for safeguarding Earth-regulating systems in the anthropocene. Proc. Natl. Acad. Sci. 121 (5), e2301531121. doi:10.1073/pnas.2301531121
Rockström, J., Steffen, W., Noone, K., Persson, Å., Chapin, F. S., Lambin, E. F., et al. (2009). A safe operating space for humanity. Nature 461 (7263), 472–475. doi:10.1038/461472a
Runting, R. K., Phinn, S., Xie, Z., Venter, O., and Watson, J. E. M. (2020). Opportunities for big data in conservation and sustainability. Nat. Commun. 11 (1), 2003. doi:10.1038/s41467-020-15870-0
Schulte-Uebbing, L. F., Beusen, A. H. W., Bouwman, A. F., and de Vries, W. (2022). From planetary to regional boundaries for agricultural nitrogen pollution. Nat. 610 (7932), 507. doi:10.1038/s41586-022-05158-2
Slaveykova, V. I. (2019). Biogeochemical dynamics research in the anthropocene. Front. Environ. Sci. 7, 7–2019. doi:10.3389/fenvs.2019.00090
Steffen, W., Richardson, K., Rockström, J., Cornell, S. E., Fetzer, I., Bennett, E. M., et al. (2015). Planetary boundaries: guiding human development on a changing planet. Science 347 (6223), 1259855. doi:10.1126/science.1259855
Steffen, W., Richardson, K., Rockström, J., Schellnhuber, H. J., Dube, O. P., Dutreuil, S., et al. (2020). The emergence and evolution of Earth system science. Nat. Rev. Earth and Environ. 1 (1), 54–63. doi:10.1038/s43017-019-0005-6
Tittensor, D. P., Novaglio, C., Harrison, C. S., Heneghan, R. F., Barrier, N., Bianchi, D., et al. (2021). Next-generation ensemble projections reveal higher climate risks for marine ecosystems. Nat. Clim. Change 11 (11), 973–981. doi:10.1038/s41558-021-01173-9
van Vuuren, D. P., Doelman, J. C., Schmidt Tagomori, I., Beusen, A. H. W., Cornell, S. E., Röckstrom, J., et al. (2025). Exploring pathways for world development within planetary boundaries. Nature 641 (8064), 910–916. doi:10.1038/s41586-025-08928-w
Villarrubia-Gómez, P., Carney Almroth, B., Eriksen, M., Ryberg, M., and Cornell, S. E. (2024). Plastics pollution exacerbates the impacts of all planetary boundaries. One Earth 7 (12), 2119–2138. doi:10.1016/j.oneear.2024.10.017
Wang, Z., Tian, H., Yang, J., Shi, H., Pan, S., Yao, Y., et al. (2020). Coupling of phosphorus processes with carbon and nitrogen cycles in the dynamic land ecosystem model: model structure, parameterization, and evaluation in tropical forests. J. Adv. Model. Earth Syst. 12 (10), e2020MS002123. doi:10.1029/2020MS002123
Wang, Z., Wang, T., Zhang, X., Wang, J., Yang, Y., Sun, Y., et al. (2024). Biodiversity conservation in the context of climate change: facing challenges and management strategies. Sci. Total Environ. 937, 173377. doi:10.1016/j.scitotenv.2024.173377
Wu, Z., Li, J., Sun, Y., Peñuelas, J., Huang, J., Sardans, J., et al. (2022). Imbalance of global nutrient cycles exacerbated by the greater retention of phosphorus over nitrogen in Lakes. Nat. Geosci. 15 (6), 464–468. doi:10.1038/s41561-022-00958-7
Zhang, X., Ward, B. B., and Sigman, D. M. (2020). Global nitrogen cycle: critical enzymes, organisms, and processes for nitrogen budgets and dynamics. Chem. Rev. 120 (12), 5308–5351. doi:10.1021/acs.chemrev.9b00613
Keywords: climate change, pollution, biogeochemical cycles, novel entity, planetary boundaries
Citation: Slaveykova VI (2025) Navigating Earth’s biogeochemical dynamics: Integrating elemental cycles, anthropogenic pressures and planetary boundaries. Front. Environ. Sci. 13:1643879. doi: 10.3389/fenvs.2025.1643879
Received: 09 June 2025; Accepted: 16 June 2025;
Published: 30 June 2025.
Edited by:
Martin Siegert, University of Exeter, United KingdomReviewed by:
Oladele Ogunseitan, University of California, Irvine, United StatesCopyright © 2025 Slaveykova. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
*Correspondence: Vera I. Slaveykova, dmVyYS5zbGF2ZXlrb3ZhQHVuaWdlLmNo