Search Results (714)

Enhancing urban ecological welfare performance is essential for achieving sustainable urban development and fostering a comprehensive regional green transformation. This study develops a quantitative assessment framework for urban ecological welfare performance, grounded in both the welfare of urban residents and their consumption of ecological resources. Employing the spatio-temporal Logarithmic Mean Divisia Index model to dissect the ecological welfare performance across 108 key prefecture-level cities within China’s Yangtze River Economic Belt, considering both temporal and spatial dimensions, the analysis reveals a “W”-shaped trajectory in the ecological welfare performance from 2006 to 2022, characterized by pronounced spatial disparities. Particularly in the downstream coastal regions and notably the Yangtze River Delta, advantages in social and economic structures, along with public fiscal outlays, contribute to a superior ecological welfare performance, exhibiting a notable spatial spillover effect. The study introduces six key factors—social benefit, economic benefit, population dispersion, population density in urban areas, urbanization scale, and ecological sustainability—to examine their influence on ecological welfare performance, uncovering substantial differences in the outcomes of temporal and spatial decomposition. Temporal decomposition indicates that economic benefit and urbanization scale are the primary drivers enhancing ecological welfare performance, whereas population dispersion is identified as the primary inhibitor. Spatial decomposition reveals that the determinants of above-average urban ecological welfare vary regionally and undergo dynamic shifts over time. Overall, a holistic understanding of the interplay among economic growth, ecological preservation, and the enhancement of residents’ welfare can inform the development and execution of tailored policies by local governments. Full article

The growing discourse surrounding biomass energy’s environmental ramifications has ignited debate among policymakers. While biomass remains a primary and readily accessible energy source, various studies have extensively examined its implications for health and the economy. However, there is a lack of evidence regarding its role in mitigating climate change. This study delves into the ecological footprint implications of biomass energy consumption in the Organisation for Economic Co-operation and Development (OECD) countries, spanning from 1990 to 2017. While the existing literature predominantly relies on parametric methodologies, offering estimates of biomass energy’s average impact on ecological footprints, it fails to capture temporal variations in this relationship. Consequently, this study employs both parametric and nonparametric time-varying techniques to elucidate the evolving impact of biomass energy utilization on ecological footprints across the studied nations. Findings from both analytical approaches converge to suggest that biomass energy usage amplifies the ecological footprint of OECD nations. Notably, the nonparametric analysis underscores the dynamic nature of this relationship over time. Based on these insights, policy recommendations are given to mitigate the adverse environmental consequences of biomass energy usage while exploring cleaner alternative energy sources. Full article

Environmental sustainability is the primary objective of policymakers all around the globe. The most viable option to deal with this situation is to increase the use of renewable energy sources, particularly bioenergy, a carbon-neutral energy source. Trading activities in clean and green products can also enhance environmental performance. The literature on the impact of bioenergy and trade in environmental goods on ecological sustainability is growing. However, the empirical literature has not shed light on the impact of forest products trade (FPT) and rural bioenergy on environmental sustainability, leaving a significant gap in the literature. To address this gap, this analysis examines the impact of FPT and rural bioenergy on environmental sustainability using 23 economies from 2000 to 2022. Empirical estimates of the model are obtained by applying several estimation techniques, such as fixed effects (FE), random effects (RE), two-stage least squares (2SLS), generalized method of moments (GMM), and cross-sectional autoregressive distributed lag (CS-ARDL). The findings confirm that FPT and rural bioenergy reduce CO₂ emissions and contribute to environmental sustainability. The estimates of control variables of economic growth, industrialization, technological development, urbanization, and financial development are positively significant, confirming that these factors increase carbon footprints and thus hurt environmental sustainability. In contrast, political stability negatively impacts carbon emissions and thus promotes environmental sustainability. In light of these findings, policymakers should encourage forest products trade and rural bioenergy to achieve environmental sustainability. Full article

A growing number of countries are concerned about the reliability of environmental indicators; as a result, there is a pressing need to find ways to improve ecological welfare on a global scale. This study investigates the dynamic linkages among CO₂ emissions, AI, economic policy uncertainty (EPU), and renewable energy consumption. To analyze these relationships empirically, this study used panel data for East Asian and Pacific countries from 2000 to 2023. This study used fully modified ordinary least squares (FMOLSs), dynamic ordinary least squares (DOLSs), Hausman fixed effects (FEs) and random effects (REs), the generalized method of moments (GMM), and variance decomposition tests. This study’s results show that AI has a positive relationship with CO₂ emissions in terms of the benchmark regression, while it shows minimal impact on CO₂ emissions according to the variance decomposition test. Similarly, economic policy uncertainty shows a strong positive relationship with CO₂ emissions through benchmark regression FEs and REs, GMM, and the variance decomposition test. An increase in EPU will positively affect CO₂ emissions. Renewable energy consumption has a strong negative impact on CO₂ emissions in East Asian and Pacific countries. These findings reveal that a unit increase in renewable energy consumption will decrease CO₂ emissions. Based on the results of this study, it is suggested that policy certainty and an upsurge in renewable energy consumption are essential for environmental upgrading. In contrast, adopting AI has no robust effect on ecological degradation (CO₂ emissions). East Asian and Pacific countries need to focus on the adoption of renewables, as well as the control of economic policy uncertainty. While AI in East Asian and Pacific countries is still in the initial stage of adoption, policy formation is essential to overcome the possible carbon footprint of AI in the short term. Full article

Food security is a major challenge for China at present and will be in the future. Revealing the spatiotemporal changes in cropland and identifying their driving forces would be helpful for decision-making to maintain grain supply and sustainable development. Hainan Island is endowed with rich agricultural resources due to its unique climatic conditions and is facing tremendous pressure in cropland protection due to the huge variation in natural conditions and human activities over the past few decades. The purpose of this study is to assess the spatiotemporal changes in and driving forces of cropland on Hainan Island in the past and predict future cropland changes under different scenarios. Key findings are as follows: (1) From 2000 to 2020, the cropland area on Hainan Island decreased by 956.22 km², causing the center of cropland to shift southwestward by 8.20 km. This reduction mainly transformed into construction land and woodland, particularly evident in coastal areas. (2) Among anthropogenic factors, the increase in the human footprint is the primary reason for the decrease in cropland. Land use changes driven by population growth, especially in economically active and densely populated coastal areas, are key factors in this decrease. Natural factors such as topography and climate change also significantly impact cropland changes. (3) Future scenarios show significant differences in cropland area changes. In the natural development scenario, the cropland area is expected to continue decreasing to 597 km², while in the ecological protection scenario, cropland conversion is restricted to 269.11 km²; however, in the cropland protection scenario, the trend of cropland reduction is reversed, increasing by 448.75 km². Our findings provide a deep understanding of the driving forces behind cropland changes and, through future scenario analysis, demonstrate the potential changes in cropland area under different policy choices. These insights are crucial for formulating sound land management and agricultural policies to protect cropland resources, maintain food security, and promote ecological balance. Full article

With emphasis on constructing low-carbon cities, the renovation of the riverbank highlights energy conservation and carbon reduction. However, methods and standards for quantifying carbon emissions during ecological river channel construction are currently lacking. There is a scientific gap in research into carbon footprint assessment and reduction potential in ecological revetment technologies in water networks of China. This study attempts to clarify the carbon emission factors of different ecological revetment technologies and explore the carbon reduction potential during the construction stage of ecological rivers from the river revetment design, construction process and materials. The results show that in the carbon emission factors of six ecological revetment technologies, building materials have the largest adjusting potential for carbon reduction. The concrete material is responsible for 55.37–95.86% of carbon emissions in six ecological river technologies, with an average proportion of 69.96%. Accordingly, the concrete material emerges as the primary contributor to carbon emissions in ecological river engineering, followed by gasoline truck transportation and earthwork excavation. Moreover, the carbon emissions from ecological frame structures were the largest, followed by those of block structures, gabion structures, planted concrete and interlocking blocks and the wooden stake structure has the smallest carbon footprint. The choice of ecological revetment technologies is not only related to the realisation of regional water conservancy functions, but it also affects the carbon emissions of water conservancy projects. Engineers and decision-makers should pay great attention to the optimal design of the project, selection of low-carbon materials, energy saving and emission reduction in the construction process. This research not only provides guidance for design units in selecting appropriate river revetment technologies but also offers a theoretical foundation and data support for construction units to optimise their construction process management. Full article

The increasing population, its requirements for food, and the environmental impact of the excessive use of inputs make crop production a pressing challenge. Integrated nutrient management (INM) has emerged as a critical solution by maximizing nutrient availability and utilization for crops and vegetables. This review paper highlights the potential benefits of INM for various vegetables and field crops and explores the conceptual strategies, components, and principles underlying this approach. Studies have shown that a wide range of vegetables and field crops benefit from INM, in terms of increased yield and improvements in yield attributes, nutrient contents and uptake, growth parameters, and various physiological and biochemical characteristics. This paper discusses biostimulants, their categories, and their impact on plant propagation, growth, photosynthesis, seed germination, fruit set, and quality. Additionally, this review explores modern sustainable soilless production techniques such as hydroponics, aeroponics, and aquaponics. These cultivation methods highlight the advancements of controlled-environment agriculture (CEA) and its contribution to nutrient management, food security and minimizing the environmental footprint. The review concludes by proposing methods and fostering discussions on INM’s future development, while acknowledging the challenges associated with its adoption. Finally, this review emphasizes the substantial evidence supporting INM as a novel and ecologically sound strategy for achieving sustainable agricultural production worldwide. Full article

The anthropogenically induced ecological resource exploitation surpasses the Earth’s regenerative capacity and has resulted in ecological bankruptcy. Conceding that, the United Nations mandates environmental restoration by 2030. Against this backdrop, this study seeks to orchestrate a hybrid framework by modulating the Quintuple Helix Model into an Anthropomorphized Stochastic Quintuple Helix Model (ASQHM). This model introduces human behavior and allows for hypothesis testing. ASQHM stipulates that the propensity of espoused eco-innovation aimed at environmental restoration is contingent upon five composite helices: human capital, democracy, Industry 5.0, media, and pro-environmental human behavior. In addition, financial development has been deemed imperative to facilitate these variables, which were considered stakeholders in this study. To fill gaps in the literature, three variables, namely democracy, Industry 5.0, and pro-environmental human behavior (PEHB), are formed through principal component analysis. This panel data study employs the Generalized Methods of Moments model to compute the ASQHM for developed and less developed countries from 1995 to 2022. The results imply that the first helix (human capital) levitates environmental restoration in developed countries (DCs) but yields the opposite in less developed countries (LDCs). Democracy, Industry 5.0, and information and communication technology helices demonstrate a solicited negative relationship with ecological footprints in both panels, thus supplementing environmental restoration. The fifth helix, PEHB, escalates ecological footprints in DCs; however, it abets environmental restoration in LDCs. The postulated ASQHM “partially” works in DCs and LDCs, rejecting its hypothesized role in the former group while confirming it in the latter group. Astonishingly, DCs fall short of the requisite PEHB (fifth helix), and LDCs do not have the at-par human capital (first helix) to reduce ecological footprints, catalyze eco-innovation, and partake in the environmental restoration process. Despite slight discrepancies in both panels, these findings validate the effectiveness of this hybrid ASQHM as a decisive determinant of environmental restoration. Based on the findings, this study also suggests practical policies. Full article

This paper studies the convergence of environmental sustainability and its main determinants in selected American countries. In addition, it studies the impact of economic activity, income inequality, trade openness, and innovative activity on the sustainability of these countries. Convergence tests such as unit root and club convergence are applied. Furthermore, cointegration and causality tests are used, and long-term parameters are estimated using methods robust for cross-sectional dependence. The results show evidence of stochastic convergence with the univariate unit root tests in the five indicators (energy consumption, carbon dioxide emissions, ecological footprint, energy intensity, and load capacity factor) used, while with the panel data unit root tests only in four (carbon dioxide emissions, ecological footprint, energy intensity, and load capacity factor). There is no evidence of convergence towards a single club considering the complete sample, but there is evidence of convergence towards several clubs. The variables are integrated of order one and are cointegrated. Moreover, using robust estimators in the presence of cross-sectional dependence in long-term economic activity, income inequality, trade openness, and innovative activity deteriorate sustainability, while renewable energy improves it in these countries. Full article

The global proliferation of Pinus radiata, known for its rapid growth and wood density, has led to an environmental challenge—significant waste production, especially bark, without a clear valorization route. This waste poses ecological concerns, and despite the crucial role of forest resources in structural applications, their limited fire resistance requires the use of coatings. However, traditional coatings lack an eco-friendly footprint. Addressing this challenge, this study aims to develop an intumescent coating with tannins extracted from waste bark, offering a sustainable alternative. This not only repurposes waste on a global scale but also aligns with the imperative for environmentally friendly materials, contributing to sustainable practices in the construction and wood treatment industry. This study achieved an eco-friendly FRR15 (fire resistance ratio 15) fire resistance classification with a 15% equivalence of low-molecular-weight tannins, presenting a sustainable alternative to commercial products. Characterization showed low-molecular-weight tannins comparable to conventional charring agents, with high hydroxyl content and oil absorption, while high-molecular-weight tannins exhibited lower viability. A reference coating achieved FRR30 fire resistance, aligning with commercial strength. The mechanical properties of tannin-based coatings matched commercial standards, with increased abrasion resistance and adhesion and decreased flexibility. Intumescent coatings with higher tannin content significantly reduced wood substrate charring and mass loss in flame response assessments. Full article

Oases play a crucial role in arid regions within the human–environmental system, holding significant ecological and biological importance. The Oasis Cold Island Effect (OCIE) represents a distinct climatic feature of oases and serves as a vital metric for assessing oasis ecosystems. Previous studies have overlooked the spatial extent of the Oasis Cold Island Effect (OCIE), specifically the boundary delineating areas influenced and unaffected by oases. This boundary is defined as the Oasis Cold Island Footprint (OCI FP). Utilizing Logistic modeling and MODIS data products, OCI FPs were calculated for the Ejina Oasis from 2000 to 2019. The assessment results underscore the accuracy and feasibility of the methodology, indicating its potential applicability to other oases. Spatial and temporal distributions of OCI FPs and the intensity of the Oasis Cold Island Effect Intensity (OCIEI) in the Ejina Oasis were analyzed, yielding the following findings: (1) OCI FP area and complexity were smallest in summer and largest in autumn. (2) Over the period 2000–2019, OCI FPs exhibited a pattern of increase, decrease, and subsequent increase. (3) OCIEI peaks in summer and reaches its lowest point in winter. Lastly, the study addresses current limitations and outlines future research objectives. Full article

Longwood Gardens (Kennett Square, PA, USA) is working toward a future where the beauty of nature can be enjoyed by all through its sustainability and stewardship efforts. Using case studies highlighting water quality and conservation, carbon footprint reduction, material circularity, and land stewardship, this paper examines the multifaceted approach that Longwood takes to address its environmental impact. First, a description of Longwood’s innovative water quality and conservation strategies and their integration of green and gray infrastructure is described. Next, the paper explores the comprehensive measures adopted to curtail its carbon footprint, from energy-efficient infrastructure to renewable energy sources. Then, Longwood’s commitment to material circularity is investigated, showcasing initiatives that reuse organic materials and create necessary products for the Gardens onsite. Finally, the Gardens’ holistic land stewardship practices are detailed, including habitat preservation and biodiversity enhancement. The paper concludes with valuable findings learned from the organization’s sustainability and stewardship journey, offering insights applicable to other gardens or campuses seeking to improve their ecological impact while maintaining a commitment to esthetic and horticultural excellence. Full article

One of the ways in which sustainable development can be understood is through the efficient management and systematization of indicators. For this reason, the study of ecological footprints is important, given that this concept integrates the different types of environmental indicators and, from the results and their interpretation, explains the total environmental impact generated through the development of daily human activities. The objective of this research was to quantify the total ecological footprint of the National University of the Altiplano in 2023. An application-type quantitative approach was considered, and the study utilized a descriptive, non-experimental design in which source data were used. The data were obtained from a primary sample through applying a survey to teachers, students, and administrative staff. The questionnaire included questions about the operations and functioning of the university, allowing us to calculate and analyze the components of its ecological footprint. It was determined that, in 2023, the university entity generated 4721.20 t CO₂ in carbon dioxide emissions due to the use and operation of infrastructure, buildings, mobility, electricity consumption, paper consumption, and water consumption. The findings indicate that the university’s operations require approximately 915.67 hectares of forest annually to offset its carbon emissions and that it has an ecological footprint (in global hectares) of 1172.06 hag/year, suggesting important sustainability challenges. Finally, it was determined that the ecological footprint per capita at the National University of the Altiplano in 2023 was 0.04 ha/person/year and 0.06 hag/person/year, due to CO₂ emissions, thus generating a greater ecological footprint of the university. These results underline the need to improve sustainable practices and review policies at the university level in order to better align with the objectives of sustainable development. Full article

This study presents issues related to electromagnetic pollution and the level of magnetic field radiation occurring around conductors used for electricity transmission and distribution. The fact that modeling and simulation are the most efficient methods of optimization, considering the cost–benefit ratio, was the premise of this work. This paper proposes the performance of a complex analysis, carried out in a comparative manner, which includes physical tests and simulations in the existing field around transmission and distribution cables used in transformer substations. In the first stage, the level of the magnetic field existing near the conductor carried by an electric current was tested (measured), and a virtual model was then designed to simulate the field in conditions similar to those of the test. The results obtained from the simulation were analyzed in comparison with those obtained by testing. The maximum permissible limits of exposure to an electromagnetic field, which are regulated by Government Decision HG 520/2016 of 20 July 2016 and Directive 2013/35/EU of the European Parliament and of the Council of 26 June 2013, were used as the reference to formulate conclusions for both situations considered. These comparisons were intended to determine the level of exposure to electromagnetic fields existing in places where electricity transmission/distribution conductors are located. Energy sustainability exists due to the versatile properties of the conductors, with the energy transmission and distribution network being functional regardless of the source of energy production. Full article

Greener materials, particularly in sandwich panels, are in increasing demand in the transportation and building sectors to reduce environmental impacts. This shift is driven by strict environmental legislation and the need to reduce material costs and fuel consumption, necessitating the utilisation of more sustainable components in the transportation and construction sectors, with improved load-bearing capabilities and diminished ecological footprints. Therefore, this study aims to analyse and evaluate the structural performance of polyethylene terephthalate (PET) core and flax or basalt/flax FRP sandwich panels as an alternative to conventional synthetic materials. The novel eco-friendly sandwich panels were manufactured using the co-curing technique. Four-point bending, edgewise compression and core shear tests were performed and insights into how the skin properties affect the strength, stiffness and failure mode of specimens were provided. The stress–strain behaviour, facing modulus and strength, flexural rigidity, core shear strength and failure modes were evaluated. The flexural facing modulus of the flax and flax/basalt sandwich skins were found to be 5.1 GPa and 9.8 GPa, respectively. The flexural rigidity of the eco-friendly sandwich panel was compared with published results and demonstrated a promising structural performance. The environmental benefits and challenges were outlined and critically evaluated focusing on transportation and construction applications. Full article