Search Results (8,091)

The main challenge of hydrogen electrolysis lies in the high cost of hydrogen production. Achieving a decarbonized energy sector requires substantial investment to shift from carbon-intensive technologies to more sustainable alternatives. However, investment decisions in this context remain complex and uncertain. Currently, green hydrogen projects account for more than 500 initiatives worldwide and are expected to expand rapidly in the coming years. Evidence from feasibility studies suggests that green hydrogen produced from renewable energy is already technically viable and is approaching economic competitiveness. The current emphasis is on large-scale deployment and learning-by-doing processes to reduce electrolyzer costs and improve supply chain efficiency. This transition requires appropriate funding mechanisms, often involving significant public sector participation alongside private investment. This study analyzes the financing structures of green hydrogen projects in Germany, Australia, and Brazil using Principal Component Analysis (PCA) to identify the most relevant combinations of technical, economic, and financial variables. Unlike previous studies that address technical, economic, and financial dimensions in isolation, this study offers an integrated, empirically grounded analysis at the project level, combining cross-country comparison with a multivariate approach. The results indicate that project characteristics are strongly associated with capital intensity and financing structures, while cost variables such as levelized cost of hydrogen (LCOH) play a secondary role in explaining variation across projects. These findings suggest that financing arrangements—particularly those involving public support mechanisms—are closely associated with project configuration in this emerging sector. However, these results should be interpreted as patterns of statistical association rather than evidence of causal relationships. Overall, the analysis highlights the importance of coordinated financing strategies in supporting the development of green hydrogen and its potential contribution to emissions reduction in line with the Paris Agreement and the transition toward climate neutrality. Full article

Assessing the level of circularity in the Hotel, Restaurant and Catering (HoReCa) sector is a significant challenge due to the lack of standardized quantification methods and the absence of structured environmental and material accounting systems, features that are typical of a sector largely composed of micro-enterprises. The technical standard UNI/TS 11820:2024 has developed a set of 71 indicators for the circular economy, structured across six domains (material resources and components; energy and water; waste and emissions; logistics; products and services; and human resources, assets, policies, and sustainability), allowing the assessment of circularity levels in a replicable and comparable manner. The present research measures circularity in a table-service restaurant micro-enterprise, which has voluntarily adopted circular economy practices since its foundation. The purpose is to test the applicability of UNI/TS 11820:2024 in the HoReCa context, improve knowledge about this technical standard, and highlight its strengths and weaknesses from the managerial, methodological and public authorities’ perspective. The overall organization’s circularity score achieved is 31.88%, with performance ranging from 14.40% for “material resources and components” to 56.25% for “human resources, assets and policies”. Although UNI/TS 11820:2024 aims at bridging theoretical and practical gaps towards a harmonized set of measurement tools, sector-specific indicators for the foodservice context remain underrepresented, and public authorities and universities should promote both basic and advanced education in the field of circular economy measurement to support wider adoption. Full article

As urban areas expand, the sustainable management of municipal water becomes a critical challenge, especially in arid and semi-arid regions facing severe water scarcity. Accurate assessment of urban plant water requirements (PWR) is essential for developing sustainable landscape architecture and resilient green infrastructure. In this study, a new quantitative equation (PWR_q) was developed as a regional proof of concept to adjust reference evapotranspiration estimates for hyper-arid conditions. A Tree Morphology Coefficient (K_tm) is introduced to combine canopy features (form, height) and leaf traits (size, density) with an updated drought-resistance coefficient (K_dr). Field measurements of 277 mature trees, representing 27 native and introduced species in Riyadh and Jeddah, Saudi Arabia, were analyzed. The framework explicitly includes an empirical multiplier to account for extreme urban heat island (UHI) effects and aerodynamic canopy scaling. Instead of direct empirical validation, the PWR_q model was benchmarked against established reference indices: Water Use Classification of Landscape Species (WUCOLS) and Simplified Landscape Irrigation Demand Estimation (SLIDE), showing strong alignment with established categorical indices and structural traits. The results confirm that the morphology-based method effectively makes previously subjective classifications objective. Notably, the quantitative assessment found that the dominant introduced species require about 3.5 times more water than native species. As a proof of concept, future research should empirically validate these findings against direct physical measurements, such as sap flow sensors or lysimeters. The proposed framework presents a practical, objective decision-support tool for municipal policymakers and landscape architects to optimize species selection, implement nature-based solutions (NBS), and achieve long-term sustainability in urban greening. Full article

Improving pedestrian safety at urban intersections is a key challenge for achieving safer and more sustainable urban transport systems. This study develops a multi-criteria decision-making model (MCDM) for selecting the most appropriate traffic signal type at pedestrian crossings in different urban zones. Traffic conditions, illegal pedestrian crossings and the number of traffic accidents were taken into account during the modelling, as well as the characteristics of the urban environment. The research involved 66,616 pedestrians at 22 pedestrian crossings located in three urban zones: school zones, central zones, and non-central zones. The data were aggregated using Bayesian (beta-binomial) and classical statistical methods. The OPA-Group method was then used to develop the model. In the decision-making phase, the Ordinal Priority Approach (OPA) was applied as the core MCDM method. It was then extended to the OPA-Group framework to incorporate group-based evaluation in accordance with the model requirements. Additionally, a comprehensive sensitivity analysis was conducted, confirming the robustness and stability of the proposed model. The results show that traditional traffic signals are most suitable for school and non-central zones, whereas countdown traffic signals are recommended for central zones. Push-button traffic signals were identified as the least efficient solution for regulating pedestrian movement at pedestrian crossings. Full article

The construction sector accounts for approximately 36% of global final energy consumption and close to 40% of total CO₂ emissions, making it a primary target of international climate policy. Despite this growing attention, the indigenous building traditions of the Ecuadorian Andes remain virtually absent from the international scientific literature on vernacular sustainability. This study presents a systematic field documentation and bioclimatic assessment of vernacular bahareque dwellings in the Kichwa-Saraguro community of Ilincho, canton of Saraguro, province of Loja, Ecuador (2700 m a.s.l.). A field survey of 30 dwellings identified five morphological typologies—I-1P, I-2P, 2B, L, and C—with typology C, a compact C-shaped block with a three-sided portal, accounting for 53.3% of the sample. A structured multi-criteria framework of 48 bioclimatic indicators distributed across eight categories, adapted to the cold-temperate mountain climate of the study area, was applied to quantify each typology’s bioclimatic performance. All typologies exceeded 75% overall compliance on the global Bioclimatic Performance Index (BPI), with typology C achieving the highest value (88.5%). Categories F (Materials and construction) and H (Cultural and social aspects) scored 100% across all typologies, reflecting system-level properties of the bahareque constructive system rather than morphological differences between typological variants; a supplementary morphological BPI restricted to Categories A–E and G is reported. An exploratory, uncalibrated energy simulation of typology C provided indicative evidence consistent with the expected thermal behavior of a high-thermal-mass bahareque envelope, with simulated minimum temperatures in the sleeping area within the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) 55-2013 comfort range (T-min 18.80 °C). Collectively, these findings contribute quantified bioclimatic documentation of vernacular bahareque architecture in Ilincho, identifying attributes—encompassing solar control, spatial compactness, high-thermal-mass envelope performance, and use of locally sourced low-embodied-energy materials—that may inform sustainable rural housing discussions in the Ecuadorian Andes and comparable high-altitude mountain contexts. Its documentation in the indexed scientific literature constitutes a step toward recognizing this constructive heritage as a practical resource for low-carbon building policy. Full article

Introduction: This article examines the roles of chiefs and traditional leaders in fostering environmental sustainability, collective responsibility, and accountability in Ghana. It argues that chieftaincy functioned as a key institution for regulating human relationships with land, natural resources, and social order in precolonial governance systems. By grounding environmental stewardship in customary authority, moral obligation, and spiritual legitimacy, chiefs helped sustain communal balance and cohesion. Methods: The article uses a conceptual and historical-interpretive approach to analyze the chieftaincy institution’s normative, political, and spiritual functions in environmental governance. It draws on interpretations of precolonial governance structures, customary practices, and indigenous cosmologies to examine how chiefs exercised authority and shaped collective conduct. Results: The analysis shows that chiefs, with their councils, established and enforced rules, norms, and sanctions that promoted sustainable community life. Their authority included custodianship of land, social order, and sacred obligations. As representatives of ancestors and intermediaries between the human and spiritual realms, chiefs reinforced a moral framework in which environmental harm was seen as both a social offence and a disruption of divine and ancestral balance. The nonpartisan nature of chieftaincy provided a unifying platform for guiding communities toward shared responsibilities, regardless of political differences. Discussion: The article concludes that chieftaincy historically served as an important mechanism for environmental stewardship and ethical governance in Ghana. Chiefs were positioned as custodians of a balanced relationship between people, land, and spiritual order. Revisiting these indigenous governance principles offers insight into how traditional authority can contribute to contemporary discussions on sustainability, accountability, and community-based environmental governance. Full article

Climate change, depleting fossil fuel reserves, and instability in petroleum prices are driving developing economies to explore cost-effective, efficient, and sustainable energy sources such as hydropower. However, there is an ongoing debate regarding the relevance, suitability, and impact of mega-dams. Much of the existing research on mega-dams examines this debate through the lens of development theories. However, mega-dams impact a wide range of stakeholders at local, national, regional, and global levels, necessitating exploration of their role from a socioeconomic perspective. This interdisciplinary case study draws knowledge from management, sociology, and economics and provides a comprehensive account of multi-stakeholder perspectives on the impact of a mega-dam and addresses the research question: How do stakeholders perceive the impact of the Merowe Dam on agricultural livelihoods, and how do they interpret the role of governance processes? Participants included farmers, a focus group with 10 members from the affected communities, and 32 key informant interviews from non-governmental organizations, political actors, academics, businessmen and leaders in the catchment areas of the Merowe Dam, Sudan. The findings suggest that despite some concerns about motivations and processes of mega-dam commissioning, these projects are perceived as beneficial for long-term and sustainable socioeconomic growth and gaining support for renewable energy use in developing economies. The participants reported that modernization of agriculture, following the establishment of the dam, increased crop yields, e.g., wheat production has increased per hectare. Farmers’ income and irrigated land have increased substantially per family due to an increase in land sizes allocated to relocated communities, leading to an overall increase in land size. Therefore, with improved processes in both pre- and post-commissioning stages, transparency, accountability, and deeper stakeholder engagement, mega-dams can facilitate a smoother transition from fossil fuels to large-scale hydropower on one hand and livelihood enhancement through agriculture and other income generating activities on the other. Full article

This study examines whether firm-level digital transformation capability (DTC) is associated with stronger operational resilience and whether governance structures condition this relationship. Operational resilience is treated here as a business-sustainability dimension based on continuity and stability of operating outcomes, not as a broad measure of environmental, social, and governance (ESG), environmental, or social sustainability performance. Using an international firm-year panel that combines standardized financial data with disclosure-based measures of implemented digital practices and governance architecture, the analysis provides observational evidence on the role of DTC in strengthening firm adaptability. In the controlled fixed-effects models, DTC is positively associated with the sales resilience ratio (SRR) (β = 0.071) and the cash-flow stability index (CFSI) (β = 0.058); an interquartile increase in DTC corresponds to approximately 0.024 in SRR and 0.019 in CFSI, or roughly 16% and 10% of their sample standard deviations. The association is stronger in firms with stronger internal oversight, auditable review mechanisms, and external ecosystem monitoring. Mechanism analyses point to supply flexibility and data visibility as plausible transmission paths, while additional tests address reproducibility, disclosure-intensity bias, construct validity, alternative governance specifications, placebo timing, restricted-shock logic, and measurement boundaries. Overall, the findings provide evidence consistent with a contingent and observational association between DTC and operational resilience when digital capabilities are embedded within accountable governance frameworks. Full article

Non-timber forest products (NTFPs) constitute an important component of forest-based production systems and biomass supply chains in Türkiye. Despite their growing eco-nomic and ecological significance, the long-term structural dynamics of NTFP production remain insufficiently understood. This study examines temporal and structural changes in NTFP production in Türkiye during the period 1988–2024 using official production statistics and production support data. The analysis applies a quantitative framework that combines linear trend analysis, Shannon diversity and Herfindahl–Hirschman concentration indices, volatility measures based on the coefficient of variation, and regression models to evaluate production trends, structural transformations, stabilization patterns, and the effectiveness of production support mechanisms. The findings reveal a non-linear and multi-phase development pattern characterized by diversification and production growth after 2000, followed by increasing concentration and greater production volatility after 2018. Although total production volume increased substantially, portfolio diversity declined over time, and dependence on a limited number of high-volume products intensified, indicating growing structural vulnerability within the system. In addition, production support mechanisms showed a weak and heterogeneous relationship with production outcomes. A limited contextual comparison with Lithuania’s multifunctional NTFP system is also included to position the findings within a broader European context. Over-all, the results suggest that increasing production alone is insufficient to ensure long-term system stability. Instead, diversification-oriented and risk-sensitive resource management strategies that account for production risks, regional disparities, and product heterogeneity-ty are essential for developing sustainable and resilient NTFP production systems. Full article

Perceived street vitality directly reflects residents’ assessments of the attractiveness of the street environment; it is not only an important focus of urban vitality research but also closely related to human-centred sustainable urban development. However, limited data availability and the complexity of urban environments have constrained fine-grained spatial analysis at the city scale. To address this issue, this study quantified perceived street vitality by collecting street-view imagery, extracting streetscape features, and integrating these data with questionnaire survey results. After comparing multiple models, a geographically weighted machine learning model was employed to identify key visual predictors, model-estimated marginal associations, interaction patterns, and spatial heterogeneity related to perceived street vitality. The results show that areas with high perceived street vitality are mainly located along street segments with abundant greenery and open spaces, whereas low-value areas are concentrated in densely built and enclosed environments. Among the various streetscape elements, buildings, vegetation, and sky are the key visual elements most strongly associated with perceived street vitality. A model incorporating these elements accounted for 67.2% of the variance in perceived street vitality. Notably, the strength of these associations varied significantly across different areas. This study provides empirical evidence and evidence-based support for sustainable urban renewal, the optimisation of street-space layouts in high-density urban areas, and the improvement in street environmental quality. Full article

Background: Global food supply chains increasingly require sustainable and transparent operations; however, empirical evidence linking sustainability practices to firm performance remains inconsistent. This study examines how sustainability practices are translated into measurable business performance outcomes through traceability implementation in Thailand’s export-oriented food-processing sector. Methods: Grounded in Stakeholder Theory, traceability implementation was conceptualized as an accountability-oriented operational mechanism enabling the systematic verification of sustainability-related activities. Data were collected from 362 export-oriented food-processing firms in Thailand and analyzed using covariance-based Structural Equation Modeling (SEM). Results: The findings indicate that sustainability practices significantly influence both traceability implementation and business performance, while traceability implementation partially mediates the sustainability–performance relationship. The results further suggest that sustainability practices generate both direct and indirect performance benefits through structured monitoring, documentation, and verification routines. Conclusions: This study demonstrates that sustainability practices become more performance-relevant when institutionalized through traceable and verifiable operational processes. The findings highlight the importance of integrating traceability implementation into sustainability strategies to strengthen transparency, stakeholder confidence, and competitiveness within export-oriented food supply chain contexts. Full article

Under the global sustainable development agenda, urban ecological resilience serves as a key indicator of park city. This study established a framework of “Retrospective Evaluation–Prospective Simulation–Zoning Control”. The study chose Chengdu and analyzed land-use changes occurring at three-year intervals from 1999 to 2023. A defense–adaptability–recovery framework was applied to assess urban ecological resilience (UER). The study further simulated land use and urban ecological resilience patterns for 2035 under three scenarios, including natural development, ecological conservation, and park city development scenarios. Finally, it coupled UER with land development intensity to delineate ecological zones and propose differentiated strategies. The results showed that (1) historical UER declined then rose, with low UER concentrated in built-up areas and relatively low UER accounting for the largest share. (2) The park city development scenario yielded the highest UER, but showed limited improvement in existing low-resilience built-up areas. (3) Zoning patterns across scenarios were highly similar, dominated by Potential Development Zones. This study identifies the optimal scenario for enhancing UER and offers zoning strategies that can inform park city development in other cities. Full article

This study aims to investigate the greenhouse gas (GHG) emissions and environmental footprint of BOCOM Petroleum, a mid-sized downstream oil company operating in Douala, Cameroon. In response to the critical need for empirical data on industrial emissions in Sub-Saharan Africa, a mixed-methods approach combining Life Cycle Assessment (LCA), carbon accounting, and stakeholder interviews was adopted. Emissions were categorised following the GHG Protocol into Scope 1 (direct), Scope 2 (energy-related), and Scope 3 (value chain). Results reveal total annual emissions of 51,734 CO₂, kg/year, with Scope 3 accounting for 38%, Scope 2 for 33%, and Scope 1 for 29%. Major emission sources include stationary combustion, laboratory processes, and the use of electricity-intensive heat-generating machines. An Environmental Management Plan (EMP) was developed, proposing actionable measures such as process optimisation, adoption of energy-efficient equipment, electrification of vehicle fleets, and improved waste management. Findings underscore the need for systemic decarbonisation strategies among mid-sized oil firms and highlight the alignment of corporate initiatives with Cameroon’s climate commitments. This study contributes a replicable methodological framework for emission auditing in industrial enterprises across the region and calls for further integration of environmental and financial planning in corporate sustainability strategies. Full article

Damage caused by Frankliniella intonsa to sunflower seeds results in the emergence of rusty speckling on the seedcoat, severely compromising seed quality in recent years. Although chemical control has remained the primary management strategy, its application during the flowering period—when F. intonsa is the most active—poses significant risks to pollinating insects and natural enemies, highlighting the urgent need for effective and environmentally sustainable control alternatives. Previous studies have shown that F. intonsa is attracted by buckwheat and that it could be a promising trap crop for F. intonsa. Thus, the attractiveness of Fagopyrum esculentum and F. tataricum to F. intonsa was compared, and the preference of F. intonsa between two buckwheat varieties was examined. Furthermore, the behavioral responses of F. intonsa to volatiles emitted by these plants in different developmental stages were assessed. The study results indicated that F. intonsa had a clear preference for F. tataricum over F. esculentum. In cage trials, the selection rates of 2nd instar nymphs and adults of F. intonsa for F. tataricum were 61.63% and 60.19% at the seedling stage, and 60.74% and 62.50% at the full-bloom stage, all significantly surpassing those of F. esculentum. Olfactory bioassays further confirmed that flowers of F. tataricum were notably more appealing to both 2nd instar nymphs and adults of F. intonsa, with selection rates of 64.17% and 61.67%, respectively. Twenty distinct floral volatiles of two buckwheat varieties were detected through the phytochemical analysis. Orthogonal partial least squares-discriminant analysis (OPLS-DA) identified seven key compounds that accounted for the observed behavioral differences. Both 2nd instar nymphs and adults of F. intonsa demonstrated a significant selection for Δ-Cadinene, with the highest selection rates of 75.00% and 76.67% recorded at a concentration of 0.1 μg/μL. Furthermore, F. intonsa exhibited a marked attraction to higher concentrations of Verbenone, which was unique to F. tataricum, and (S)-2-Methyl-1-butanol, which was unique to F. esculentum. Field intercropping experiments confirmed that F. tataricum outperformed F. esculentum in trapping F. intonsa within sunflower plots. In conclusion, the results indicated that F. tataricum possessed considerable potential as a trap crop for the integrated management of F. intonsa in sunflower cultivation systems. Full article

Soil quality (SQ) refers to the soil’s capacity, as influenced by management practices, to sustain productivity, maintain environmental quality, and provide essential ecosystem services. The impacts (2012–2016) of gypsum application, cover cropping, and crop rotation on SQ were evaluated under rainfed no-till (NT) systems at sites in Shorter, Alabama; Farmland, Indiana; and Hoytville and Piketon, OH, USA. Experimental treatments were arranged in a randomized complete block design in a factorial combination of gypsum (0, 1.1, and 2.2 Mg ha⁻¹), cover crop [cereal rye (Secale cereale) or no cover], and crop rotations as follows: soybean (Glycine max; SS), corn (Zea mays)–soybean (CS), and soybean–corn (SC). Composite soil samples were collected at 0–15 and 15–30 cm depths and analyzed for biological, chemical, and physical properties to compute a comprehensive SQ index (SQI_Comp). Principal component analysis identified a minimum dataset (MDS), including microbial biomass, organic carbon, and mean weight diameter, used to compute SQI_MDS. Applying gypsum at 2.2 Mg ha⁻¹ increased SQI_Comp by 3–7% and SQI_MDS by 7–17% at most sites compared with the control. The CS rotation produced the highest SQ, exceeding SS by 5–10%. Cover crops had minimal overall effects on SQ, except in Indiana. When averaged across all sites, SQ differences between depths were 19% for SQI_Comp and 33% for SQI_MDS. Significant linear relationships between SQI_MDS and SQI_Comp indicate that SQI_MDS accounted for most of the variability (R² = 0.77–0.94) in SQI_Comp. Overall, gypsum application at 2.2 Mg ha⁻¹ and the CS rotation improved surface SQ under NT systems, and SQI_MDS is better suited for relative comparisons than for absolute quantification. Full article