Environmental Challenges Research Articles

The sustainable potential of the architectural and urban heritage of the Algerian ksour

ABSTRACT This paper aims to assess the sustainability potential of Algerian desert Ksour's architectural and urban heritage. It identifies systems aligning with the 17 sustainable development goals (SDGs), categorized into formal, spatial organization, and architectonic aspects. The approach correlates Ksour's architectural features with SDGs defined by the International Union of Architects, yielding 40 passive features applicable for achieving SDGs. Notably, features like high windows (architectural) and strategic siting (urban) remain relevant for energy efficiency and carbon footprint reduction. This research gives us the opportunity to improve our strategies for rehabilitating and adapting built heritage so that it can meet current environmental challenges, but also opens up the possibility in the future of continuing to identify more sustainable systems by extending the study of heritage examples, but also and above all of developing a reflection on the adaptation of these passive systems in the design of contemporary architectural and urban projects.

The role of green bonds in reducing CO2 emissions: a case of developing countries

PurposeThe global economy is growing very fast, and it is also facing environmental challenges. Due to increased economic activities, global warming is rising as a result of greenhouse gas emissions. Concepts like green finance and green investments are emerging to battle climate issues. The present study empirically examines the impact of green bonds on carbon dioxide (CO2) emissions in developing countries, as these countries are producing 63% of CO2 emissions around the globe.Design/methodology/approachTo check this impact, pooled ordinary least squares (OLS), fixed effect and generalized method of moments (GMM) techniques are applied using the annual data of 65 developing countries from 2008 through 2021.FindingsThe results indicate that the overall effect of green bonds on CO2 emissions is negative, as more issuance of green bonds reduces CO2 emissions, confirming results from the existing empirical literature. The study found that more foreign direct investment (FDI) and urbanization lead to more CO2 emissions, while increase in trade openness helps reduce CO2 emissions. It was found that promoting green bonds will help to promote environmentally friendly projects that will help to reduce CO2 emissions. Rapid urbanization has led to more energy demand for various industries like manufacturing, transportation and residential sectors, which leads to more CO2 emissions.Practical implicationsThe policymakers in these countries should make policies that help in reducing carbon emission by increasing green bonds and FDI in supporting projects that are environmentally friendly. Therefore, to mitigate such current and future issues, policymakers in developing countries need to give serious attention to this area to fulfill sustainable development goals.Originality/valueThis study presents a pioneering examination of green bonds and CO2 emissions in 65 lower- and middle-income countries (developing countries). We have tried to cover all developing countries that are causing more greenhouse gas emissions and need to shift to green finance strategies. It will be a contribution to the body of knowledge regarding the role of green bonds in reducing CO2 emissions. The present study will help in assessing the importance of green bonds in bringing low-carbon economies.

Breathing Air and Living Underwater: Molecular Evolution of Genes Related to Antioxidant Response in Cetaceans and Pinnipeds.

Cetaceans and pinnipeds are lineages of mammals that have independently returned to the aquatic environment, acquiring varying degrees of dependence on it while sharing adaptations for underwater living. Here, we focused on one critical adaptation from both groups, their ability to withstand the ischemia and reperfusion experienced during apnea diving, which can lead to the production of reactive oxygen species (ROS) and subsequent oxidative damage. Previous studies have shown that cetaceans and pinnipeds possess efficient antioxidant enzymes that protect against ROS. In this study, we investigated the molecular evolution of key antioxidant enzyme genes (CAT, GPX3, GSR, PRDX1, PRDX3, and SOD1) and the ROS-producing gene XDH, in cetaceans and pinnipeds lineages. We used the ratio of non-synonymous (dN) to synonymous (dS) substitutions as a measure to identify signatures of adaptive molecular evolution in these genes within and between the two lineages. Additionally, we performed protein modeling and variant impact analyzes to assess the functional consequences of observed mutations. Our findings revealed distinct selective regimes between aquatic and terrestrial mammals in five of the examined genes, including divergences within cetacean and pinniped lineages, between ancestral and recent lineages and between crowns groups. We identified specific sites under positive selection unique to Cetacea and Pinnipedia, with one site showing evidence of convergent evolution in species known for their long and deep-diving capacities. Notably, many sites under adaptive selection exhibited radical changes in amino acid properties, with some being damaging mutations in human variations, but with no apparent detrimental impacts on aquatic mammals. In conclusion, our study provides insights into the adaptive changes that have occurred in the antioxidant systems of aquatic mammals throughout their evolutionary history. We observed both distinctive features within each group of Cetacea and Pinnipedia and instances of convergence. These findings highlight the dynamic nature of the antioxidant system in response to challenges of the aquatic environment and provide a foundation for further investigations into the molecular mechanisms underlying these adaptations.

Government political ideology and green innovation: evidence from OECD countries

In this paper, we examine the relationship between government political ideology and green innovation. We employ data on 20 democratic countries with multi-party systems between 2010 and 2018. Green innovation is measured by the total patents in environment-related technologies. We find a negative relationship between left-leaning government and green innovation, suggesting that leftist governments are associated with low green innovations. This finding is consistent with the political assumption that leftist governments resist technological advancement because it may cause unemployment, whereas rightist promotes technological advancement to benefit the capitalist. We also find that the effect of political ideology remains the same during electoral years, implying that elections do not present any pressure on parties to change their course towards green innovation. Our result implies that partisan politics matters in finding solutions to unending environmental challenges. The results are robust to alternative measurements of variables and econometric identification strategies.

Circular Economy and Business Transformation in European Furniture Industry

In today’s global landscape, industries must develop solutions to address environmental challenges, particularly emphasizing sustainable practices. The furniture industry, a significant contributor to resource depletion and environmental impact, requires immediate attention in this regard. This research focuses on exploring and establishing a framework for Circular Economy (CE) Business Models specifically designed for the furniture sector. By bridging existing research gaps, this study aims to support the adoption of sustainable Business Models aligning with EU Sustainable Development Goals (SDGs). The focus of this research is on the Sustainable Manufacturing and Eco Design Business Models. Given the limited literature available, this study seeks to enrich general understanding and provide practical insights to companies aiming to adopt more sustainable Business Models. To achieve this objective, a thorough literature review has been conducted. After initial literature review, we identified nine crucial value sources that served as the building blocks for a variable modeling framework designed for furniture industry Business Models. Transitioning from the literature review to an empirical analysis, secondary data used for quantitative desk analysis. As a result of this research, two archetypes have been identified specifically for furniture companies. These archetypes offer practical pathways for businesses aiming to transition towards sustainability. This paper contributes by providing a practical roadmap for furniture businesses to embrace CBMs. By offering validated archetypes and actionable insights, it aims to empower companies to align their strategies with sustainable practices.

3D Path Planning of the Solar Powered UAV in the Urban-Mountainous Environment with Multi-Objective and Multi-Constraint Based on the Enhanced Sparrow Search Algorithm Incorporating the Levy Flight Strategy

In response to practical application challenges in utilizing solar-powered unmanned aerial vehicle (UAV) for remote sensing, this study presents a three-dimensional path planning method tailored for urban-mountainous environment. Taking into account constraints related to the solar-powered UAV, terrain, and mission objectives, a multi-objective trajectory optimization model is transferred into a single-objective optimization problem with weight factors and multi-constraint and is developed with a focus on three key indicators: minimizing trajectory length, maximizing energy flow efficiency, and minimizing regional risk levels. Additionally, an enhanced sparrow search algorithm incorporating the Levy flight strategy (SSA-Levy) is introduced to address trajectory planning challenges in such complex environments. Through simulation, the proposed algorithm is compared with particle swarm optimization (PSO) and the regular sparrow search algorithm (SSA) across 17 standard test functions and a simplified simulation of urban-mountainous environments. The results of the simulation demonstrate the superior effectiveness of the designed improved SSA based on the Levy flight strategy for solving the established single-objective trajectory optimization model.

Seasonal variation in D2/3 dopamine receptor availability in the human brain.

Brain functional and physiological plasticity is essential to combat dynamic environmental challenges. The rhythmic dopamine signaling pathway, which regulates emotion, reward and learning, shows seasonal patterns with higher capacity of dopamine synthesis and lower number of dopamine transporters during dark seasons. However, seasonal variation of the dopamine receptor signaling remains to be characterized. Based on a historical database of healthy human brain [11C]raclopride PET scans (n = 291, 224 males and 67 females), we investigated the seasonal patterns of D2/3 dopamine receptor signaling. Daylength at the time of scanning was used as a predictor for brain regional non-displaceable binding of the radiotracer, while controlling for age and sex. Daylength was negatively correlated with availability of D2/3 dopamine receptors in the striatum. The largest effect was found in the left caudate, and based on the primary sample, every 4.26h (i.e., one standard deviation) increase of daylength was associated with a mean 2.8% drop (95% CI -0.042 to -0.014) of the receptor availability. Seasonally varying D2/3 receptor signaling may also underlie the seasonality of mood, feeding, and motivational processes. Our finding suggests that in future studies of brain dopamine signaling, especially in high-latitude regions, the effect of seasonality should be considered.

Repurposing Sewage and Toilet Systems: Environmental, Public Health, and Person‐Centered Healthcare Applications

AbstractGlobal terrestrial water supplies are rapidly depleting due to the consequences of climate change. Water scarcity results in an inevitable compromise of safe hygiene and sanitation practices, leading to the transmission of water‐borne infectious diseases, and the preventable deaths of over 800.000 people each year. Moreover, almost 500 million people lack access to toilets and sanitation systems. Ecosystems are estimated to be contaminated by 6.2 million tons of nitrogenous products from human wastewater management practices. It is therefore imperative to transform toilet and sewage systems to promote equitable access to water and sanitation, improve public health, conserve water, and protect ecosystems. Here, the integration of emerging technologies in toilet and sewage networks to repurpose toilet and wastewater systems is reviewed. Potential applications of these systems to develop sustainable solutions to environmental challenges, promote public health, and advance person‐centered healthcare are discussed.

A 3D In-vitro model of the human dentine interface shows long-range osteoinduction from the dentine surface

Emerging regenerative cell therapies for alveolar bone loss have begun to explore the use of cell laden hydrogels for minimally invasive surgery to treat small and spatially complex maxilla-oral defects. However, the oral cavity presents a unique and challenging environment for in vivo bone tissue engineering, exhibiting both hard and soft periodontal tissue as well as acting as key biocenosis for many distinct microbial communities that interact with both the external environment and internal body systems, which will impact on cell fate and subsequent treatment efficacy. Herein, we design and bioprint a facile 3D in vitro model of a human dentine interface to probe the effect of the dentine surface on human mesenchymal stem cells (hMSCs) encapsulated in a microporous hydrogel bioink. We demonstrate that the dentine substrate induces osteogenic differentiation of encapsulated hMSCs, and that both dentine and β-tricalcium phosphate substrates stimulate extracellular matrix production and maturation at the gel-media interface, which is distal to the gel-substrate interface. Our findings demonstrate the potential for long-range effects on stem cells by mineralized surfaces during bone tissue engineering and provide a framework for the rapid development of 3D dentine-bone interface models.

Signalling: Growth Promoters and Inhibitors

Plant growth and development are intricately regulated by a multitude of signaling pathways that respond to internal and external cues. Central to these regulatory mechanisms are the signaling pathways of growth promoters and inhibitors. Various growth-promoting hormones, including auxins, cytokinins, gibberellins, and brassinosteroids, stimulate cell division, elongation, and differentiation, playing vital roles in shaping plant architecture and influencing various developmental processes. The pathways of these growth promoters involve specific receptors and transcription factors that orchestrate growth in response to dynamic signals. In contrast, growth inhibitors, represented by hormones like abscisic acid, ethylene, jasmonic acid, and salicylic acid, act as crucial checkpoints that restrict growth during stress, pathogen attacks, or other adverse conditions. These signaling pathways trigger growth inhibition and activate defense mechanisms, enabling plants to adapt to challenging environments. Balancing the interplay between growth promoters and inhibitors allows plants to allocate resources efficiently and ensure their survival under changing circumstances. Understanding these signaling pathways is not only fundamental to plant biology but also essential for applications in agriculture, horticulture, and environmental management. This abstract provides a concise overview of these essential processes. This knowledge enables us to manipulate plant growth and development for improved crop yields, disease resistance, and stress tolerance. Ongoing research continues to unravel the complexities of these pathways, offering valuable insights into how plants delicately balance growth promotion and inhibition to thrive in an ever-evolving world.

Does Reduced Space Result in Fewer Rights? Controlled Shrinking in the Urban Renewal of Genoa

This article explores three examples of urban design initiatives in Genoa in an attempt to highlight the potential and possible contradictions that controlled shrinking projects pose for the future of contemporary cities. Genoa, a symbol of Italian shrinking cities, has been strongly defined over the years by post-industrialisation transformations and by long-standing conditions of urban shrinkage. Despite facing continuous shrinkage, local urban development policies have historically focused exclusively on urban growth and expansion. Only recently have some areas in Genoa started to adopt spatial planning experiences that actively pursue degrowth policies, aiming to reduce existing urban fabric and decrease urban density. These initiatives are adopted in specific areas affected by demographic decline, hydrogeological risks, pollution, or catastrophic events. These spatial strategies justify their existence by invoking concepts like smart shrinkage and degrowth, promising improvements in both environmental and social conditions. However, this article notes how these concepts in Genoa are not aligned with the actual social and environmental challenges that these considerations and positions pose. In fact, the urban renewal initiatives introduced by institutions, in reality, lean towards a strategy of shrinkage and demolition of residential complexes, transportation infrastructure, and productive spaces, with diverse and conflicting results. The observed controlled shrinking projects neglect the synthesis of the territory as a palimpsest, ignore new ecological sensitivities, and lack awareness of the social implications associated with the concepts of smart shrinkage and degrowth. Instead, the three instances introduce a spatial project that still adheres to the underlying principles of growth and exploitation, presenting a shrinkage of the existing urban fabric that is mere illusion. It involves clearing out the deteriorated spaces only to fill them with capitalist rhetoric and models that, instead of creating space, undermine fundamental rights. Nonetheless, a closer examination of these three missed opportunities sheds light on the necessary knowledge, actions, and design approaches for a city to navigate urban shrinkage adeptly. This exploration also reveals the potential for the city to transform into a framework and platform, inspiring and guiding new urban planning paradigms for sustainable development.

Selected Driver Variables for the Simulation of Land-Use and Land-Cover Change for the Republic of Djibouti: A Study from Semi-Arid Region

Abstract. This study aims to integrate driver variables with a land use change model (LCM) to explore their impact on the natural environment within the context of land-use changes in the Republic of Djibouti, considering possible Business-as-usual scenarios. Secondary data from 1990 and 2012 on land use land cover (LULC) were analyzed, with a 2022 map generated by adopting the same method of secondary data used (random forest classification in Google Earth Engine (GEE)) for validation. Eight key driver variables were utilized to model plausible future land cover (2035) for Djibouti. Statistical outputs and change maps from the LCM were compared to gauge historical change estimates and simulated scenarios. Analysis from 1990 to 2022 highlights significant land use and cover changes spurred by urbanization, environmental factors, and economic development. Barren land and bushland dominated, while built-up areas and water bodies expanded notably. Urbanization, agriculture, and climate change contributed to vegetation degradation, with declines in mangroves and increases in built-up areas. Water bodies also expanded during this period. Projections from the 2035 LULC map anticipate further urban expansion, underscoring the need for sustainable land management practices. In conclusion, comprehensive land-use planning, interdisciplinary approaches, and stakeholder engagement are deemed critical for addressing Djibouti's socio-economic and environmental challenges and steering towards a sustainable future. These simulated results offer valuable insights for regional governments to frame strategic policies and assess management actions for resource utilization amidst urbanization and population growth trends.

Mechanically programmable substrate enable highly stretchable solar cell arrays for self-powered electronic skin

Development of stretchable solar cells to accommodate large strain without sacrificing the power conversion efficiency is challenging. This study presents a novel approach to manufacture highly stretchable solar cell arrays, which can be integrated into wearable medical devices to operate under challenging environments. Overcoming the limitations of rigid metal wires, liquid metal wires are employed to connect single crystal silicon solar cells, ensuring both high conversion efficiency and exceptional stretchability (up to 100%). The manufacturing process introduces embedding electrospinning films into elastic silicone substrates to create a tight bond between rigid solar cells and stretchable substrates with programmable strain capabilities. Notably, a stretchable interconnect wire is efficiently fabricated using the semi-liquid metal template printing technique and demonstrates remarkable conductivity (up to 6 × 106 S/m). Individual structural unit of solar cell presents an impressive tensile rate of 200%, and endures up to 5000 cycles of tensile testing. The overall solar cell array exhibits outstanding adaptability to extensive bending and twisting, with a mere 0.1% short-circuit current reduction in its maximum stretched state. The stretchable photovoltaic device is successfully employed in creating self-powered electronic skin for continuous real-time monitoring of parameters, showcasing its valuable potential in wearable medical electronic devices and comprehensive sports health monitoring.

Assessing the Effect of Compensation Packages, Work-Life Balance Policies, and Career Development Opportunities on Employee Retention: A Case Study of MSME Employee

In today's competitive business environment, Micro, Small, and Medium Enterprises (MSMEs) face significant challenges in attracting and retaining top talent. This study examines the impact of compensation packages, work-life balance policies, and career development opportunities on employee retention within MSMEs. Using a quantitative research design and Partial Least Squares Structural Equation Modeling (PLS-SEM), data from 300 respondents were analyzed to explore the relationships between these factors. The findings reveal significant positive relationships between compensation packages, work-life balance policies, career development opportunities, and employee retention. These results highlight the importance of strategic investments in human capital and the creation of conducive work environments to foster employee loyalty and commitment within MSMEs.

Impact of Relational Coordination on Job Satisfaction and Willingness to Stay: A Cross-Sectional Survey of Healthcare Professionals in South Tyrol, Italy

Job satisfaction and willingness to stay are critical for workforce stability in a challenging healthcare environment. This study examined how relational coordination, a key factor in teamwork and communication, influences outcomes among healthcare professionals in a bilingual, culturally mixed region of Italy. This cross-sectional survey included general practitioners, hospital physicians, nurses, and administrators from the South Tyrol Health Service, using the ‘Relational Coordination Survey’ and additional measures of job satisfaction and willingness to stay. The analytical methods used included descriptive statistics, correlations, and regression analyses. This study applied path analysis, including mediation and moderation techniques, to investigate the roles of relational coordination and job satisfaction in influencing the willingness to stay. It employs Conditional Process Analysis with the PROCESS macro in SPSS, focusing on models for moderated mediation analysis. The results indicated a critical influence of relational coordination on both job satisfaction and willingness to stay among the 525 healthcare professionals. Job satisfaction varied by health district and years of service, with midcareer professionals being the least satisfied. The findings highlight the central role of relational coordination in job satisfaction and willingness to stay and confirm that low job satisfaction increases turnover intentions. Relational coordination directly enhanced job satisfaction and willingness to stay, while also serving as a mediating factor that amplifies the impact of job satisfaction on retention intentions. This study reinforces the need for strong teamwork and communication to stabilize the healthcare workforce. Targeted interventions aimed at improving relational coordination could significantly enhance job satisfaction and retention among healthcare professionals, particularly in culturally diverse settings such as South Tyrol.

A Review on Bridging Molecular Biology and Ecological Dynamics through Integrative Approaches in Zoology

The integration of molecular biology with ecological dynamics has emerged as a transformative approach in zoology, enhancing our understanding of biodiversity, ecosystem health, and the adaptive responses of species to environmental changes. This review synthesizes key developments and methodological innovations at the intersection of molecular biology and ecological dynamics, highlighting the application of DNA barcoding, environmental DNA (eDNA) analyses, molecular phylogenetics, and advanced computational models in elucidating complex biological interactions and evolutionary patterns. Significant advancements include the use of high-throughput sequencing technologies and CRISPR-Cas systems that have expanded our ability to explore genetic diversity and manipulate genetic material for conservation purposes. The review discusses the predictive capabilities of integrative models that combine genetic with ecological data, offering insights into species resilience and ecosystem stability under varying environmental scenarios. Challenges in data integration, such as issues of scale, complexity, and the necessity for interdisciplinary cooperation, are critically examined. Technical limitations related to data management and ethical considerations in the use of genetic information are also explored. Looking forward, the review identifies emerging technologies and their potential impacts on ecological and conservation biology, emphasizing the need for policies that support sustainable management and conservation strategies. This review underscores the profound impact of integrating molecular biology with ecological dynamics, which not only enhances our scientific understanding but also provides practical frameworks for addressing global environmental challenges.

Emerging Trends and Challenges in Pink Hydrogen Research

Pink hydrogen is the name given to the technological variant of hydrogen generation from nuclear energy. This technology aims to address the environmental challenges associated with conventional hydrogen production, positioning itself as a more sustainable and eco-efficient alternative, while offering a viable alternative to nuclear power as a source of electricity generation. The present research analyzes the landscape of pink hydrogen research, an innovative strand of renewable energy research. The methodology included a comprehensive search of scientific databases, which revealed a steady increase in the number of publications in recent years. This increase suggests a growing interest in and recognition of the importance of pink hydrogen in the transition to cleaner and more sustainable energy sources. The results reflect the immaturity of this technology, where there is no single international strategy and where there is some diversity of research topic areas, as well as a small number of relevant topics. It is estimated that the future development of Gen IV nuclear reactors, as well as Small Modular Reactor (SMR) designs, will also favor the implementation of pink hydrogen.

Marketization Mechanism of Environmental Protection Law under Global Governance

The Global Environmental Problem is becoming serious, which needs to maintain the environmental governance mechanism effectively. This study analyzes the marketization mechanism of environmental protection law under global governance to meet the environmental challenge. Analyzing the severe background of environmental problems, highlighting the urgency of global governance in environmental protection, it explores the main content of the market-oriented mechanism of environmental protection law. Using various research methods such as literature analogy and clause research, this topic is elaborated from different perspectives. The market-oriented mechanism of environmental protection laws helps to stimulate the environmental awareness of enterprises and individuals, promote the effective utilization of resources and sustainable development of the environment. Attention should be paid to exploring areas such as improving market supervision, strengthening international cooperation, and promoting technological innovation, in order to provide reference for a better global environmental governance mechanism.

Tourists’ risk perceptions and pro-environmental behaviour during the pandemic: the roles of environmental concern and environmental ethics reflection

ABSTRACT The COVID-19 pandemic has served as a stark reminder to humanity of the urgent need to address environmental concerns. Given the intricate links between tourism and ecological issues, whether perceived risks during the pandemic can foster pro-environmental behaviour through increased concern and reflection about environmental challenges. Drawing on social cognitive theory, this study delves into the mechanisms that shape how visitors’ risk perceptions influence their pro-environmental actions in the context of the pandemic. From an online survey, 731 valid responses were accrued. The findings reveal that tourists’ risk perceptions have a significant positive influence on environmental concern and pro-environmental behaviour, environmental concern plays a partially mediating role in the relationship between tourists’ risk perceptions and pro-environmental behaviour. And environmental ethics reflection plays a positive moderating role in that mediated relationship. Based on these findings, management implications are proposed to promote pro-environmental behaviour among tourists, and the limitations of this study and future research directions are highlighted.

Re-imagining delightful experiences in “New Normal” conditions: A systematic critical review and future research agenda

Disasters and crises, including the COVID-19 pandemic, have created an uncertain and challenging environment, particularly for the hospitality and service-based industries, forcing managers to seek effective approaches in designing and staging delightful experiences in post-crisis conditions. This paper aims to advance research in delightful customer experiences in the hospitality and service-based industries in the post-crisis “new normal” conditions by (1) systematically and critically reviewing non-crisis and pre-pandemic findings on customer delight, (2) updating and structuring new findings in times of crisis and during the pandemic, and (3) thus suggesting new ways of conceptualising customer delight in the “new normal” conditions. Several conceptual gaps are identified based on this systematic critical review, which eventuates the development of a dual-pathway framework in the "new normal" context. Following this, several future research directions and practical implications for more effective delightful experience management are provided.