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Open AccessArticle

Everyday Energy Information Literacy and Attitudes towards Energy-Related Decisions: Gender Differences among Finns

by

Teija Keränen

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Heidi Enwald

Resources 2023, 12(6), 70; https://doi.org/10.3390/resources12060070 - 01 Jun 2023

Abstract

Many household-level decisions are made in families and, in studies, gender has been found to be an important factor affecting both household energy consumption behavior and household-level decisions related to energy use. This article scrutinizes everyday energy information literacy (EEIL) based on qualitative [...] Read more.

Many household-level decisions are made in families and, in studies, gender has been found to be an important factor affecting both household energy consumption behavior and household-level decisions related to energy use. This article scrutinizes everyday energy information literacy (EEIL) based on qualitative data collected from Finnish households in 2018 and reflects the findings by the gender differences that emerged from the quantitative analysis. The data (n = 415) included Finnish households (n = 323) and the residents of Ii municipality (n = 92), a pioneering municipality striving for carbon neutrality. The results indicate that there are gender differences in the dimensions of EEIL. Scrutinizing the qualitative data revealed the nuances of the differences. The qualitative data brought depth to the analysis by deciphering examples of respondents’ views and perceived challenges in improving energy efficiency at home. The examples also illustrate the respondents’ need for energy counselling and trusted parties from whom they hope information and advice. The article provides new information on gender differences in EEIL. Gaining more information on different groups and their attitudes, capabilities, and preferences helps to achieve carbon neutrality targets as a society. The results may be utilized in tailored communication for specific target groups and in communities’ decision making and policies. Full article

(This article belongs to the Special Issue Women's Special Issue Series: Sustainable Resource Management)

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Open AccessArticle

Quality Assessment and Classification of Feedstock for Bioenergy Applications Considering ISO 17225 Standard on Solid Biofuels

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Resources 2023, 12(6), 69; https://doi.org/10.3390/resources12060069 - 29 May 2023

Abstract

Biomass materials play a key role in the renewable energy market as they can serve as a suitable alternative to fossil fuels. However, the quality of the material entering bioenergy plants is often a cause of technical concern. Biomass quality assessment is crucial [...] Read more.

Biomass materials play a key role in the renewable energy market as they can serve as a suitable alternative to fossil fuels. However, the quality of the material entering bioenergy plants is often a cause of technical concern. Biomass quality assessment is crucial not only for energy characterization but also for environmental and operational aspects. The goal of this study is to characterize and classify the biomasses used by Italian power plants with reference to the quality classes stated by the ISO standard 17225:2021. A further objective is to verify the ability of the standard to classify heterogeneous and specific biomasses. In this study, more than 900 biomass samples were analyzed. The samples were collected from several Italian power plants with >5 MWe between 2010 and 2020, and the most important physical and chemical parameters were analyzed according to the international standards of reference. The results of the analyses were collected in a large dataset used for subsequent statistical analyses. Statistical analyses applied are Principal Component Analysis and Pearson correlation maps, which showed that the ash content is a fundamental and ideal parameter to assess the biomass quality. Results obtained demonstrate that herbaceous biomasses are of low quality mainly due to the high ash content; a relatively low ash content was found for woody biomasses. Full article

(This article belongs to the Special Issue Biomass Energy Resources: Feedstock Quality and Bioenergy Sustainability - Volume II)

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Open AccessReview

A Review of Critical Element Concentrations in High Enthalpy Geothermal Fluids in New Zealand

by

Lucjan Sajkowski

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Rose Turnbull

and

Karyne Rogers

Resources 2023, 12(6), 68; https://doi.org/10.3390/resources12060068 - 29 May 2023

Abstract

This review compiles publicly available datasets describing the chemical composition of geothermal fluids from eight wells in the Taupo Volcanic Zone (TVZ) and Ngāwhā, New Zealand. Our review allows previously reported geothermal reservoir water compositions at various locations around the TVZ (and Ngāwhā) [...] Read more.

This review compiles publicly available datasets describing the chemical composition of geothermal fluids from eight wells in the Taupo Volcanic Zone (TVZ) and Ngāwhā, New Zealand. Our review allows previously reported geothermal reservoir water compositions at various locations around the TVZ (and Ngāwhā) to be assessed and compared for the first time. The combined data present a new perspective on potential critical elements of geothermal resources and will be a valuable tool for future research projects and investment opportunities. Composition data were used to estimate the annual flux of different elements in New Zealand geothermal systems. Several elements found in New Zealand geothermal fluids are currently considered ‘critical’ for the transition to a carbon-neutral economy and are present in economically extractable quantities. We estimate that each year, approximately 1100 tons of lithium pass as heat exchange fluids through Wairakei geothermal power station. An overview of the critical elemental capture and extractive potential from New Zealand’s geothermal fields is provided. Full article

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Open AccessReview

Microplastic Pollution in Terrestrial Ecosystems and Its Interaction with Other Soil Pollutants: A Potential Threat to Soil Ecosystem Sustainability

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Harikesh Bahadur Singh

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Vishal Tripathi

Resources 2023, 12(6), 67; https://doi.org/10.3390/resources12060067 - 27 May 2023

Abstract

The production and disposal of plastics have become significant concerns for the sustainability of the planet. During the past 75 years, around 80% of plastic waste has either ended up in landfills or been released into the environment. Plastic debris released into the [...] Read more.

The production and disposal of plastics have become significant concerns for the sustainability of the planet. During the past 75 years, around 80% of plastic waste has either ended up in landfills or been released into the environment. Plastic debris released into the environment breaks down into smaller particles through fragmentation, weathering, and other disintegration processes, generating microplastics (plastic particles ≤ 5 mm in size). Although marine and aquatic ecosystems have been the primary focus of microplastic pollution research, a growing body of evidence suggests that terrestrial ecosystems are equally at risk. Microplastic contamination has been reported in various terrestrial environments from several sources such as plastics mulch, pharmaceuticals and cosmetics, tire abrasions (tire wear particles), textiles industries (microfibers), sewage sludge, and plastic dumping. Recent studies suggest that the soil has become a significant sink for pollutants released into terrestrial ecosystems and is often contaminated with a mixture of organic and inorganic pollutants. This has gradually caused adverse impacts on soil health and fertility by affecting soil pH, porosity, water-holding capacity, and soil microbial enzymatic activities. Microplastics can interact with the co-existing pollutants of the environments by adsorbing the contaminants onto their surfaces through various intermolecular forces, including electrostatic, hydrophobic, non-covalent, partition effects, van der Waals forces, and microporous filling mechanisms. This subsequently delays the degradation process of existing contaminants, thereby affecting the soil and various ecological activities of the ecosystem. Thus, the present article aims to elucidate the deleterious impact of microplastics and their interactions with other pollutants in the terrestrial ecosystem. This review also addresses the impact of microplastics in disrupting the soil sustainability of the planet. Full article

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Open AccessArticle

Carbon-Energy Impact Analysis of Heavy Residue Gasification Plant Integration into Oil Refinery

by

Slavomír Podolský

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Miroslav Variny

and

Tomáš Kurák

Resources 2023, 12(6), 66; https://doi.org/10.3390/resources12060066 - 27 May 2023

Abstract

A gasification plant may partially replace an industrial thermal plant and hydrogen production plant by polygenerating valuable products (hydrogen, power, steam) from low-value materials. Carbon energy analysis is one way of conceptually evaluating such processes. In this paper, the integration of a heavy [...] Read more.

A gasification plant may partially replace an industrial thermal plant and hydrogen production plant by polygenerating valuable products (hydrogen, power, steam) from low-value materials. Carbon energy analysis is one way of conceptually evaluating such processes. In this paper, the integration of a heavy residue (HR) gasification plant into a mid-size oil refinery (5 million t per year crude processing rate) is conceptually assessed via the comparison of electricity, natural gas and heavy residue consumption, and CO₂ emissions. The main purpose of the integration is to reduce the consumption of natural gas currently used for hydrogen production at the expense of increased HR consumption and to achieve a reduction in CO₂ emissions. Two case studies with different modes of operation were compared to base case showing that annual reduction of 2280 GWh in natural gas consumption with constant heat and hydrogen production is possible, accompanied with a slight increase in electricity purchase by 28 GWh per year. HR processing in the refinery increases by over 2800 GWh per year. The refinery’s CO₂ emissions increase by more than 20% (up to 350 kt per year) as a result, while, after incorporating external emissions into the balance, a decrease of more than 460 kt CO₂ per year can be achieved. This confirms that the integration of gasification plants within industrial enterprises and clusters has a positive environmental and energy impact and supports the idea of converting low-value material to more valuable products in polygeneration plants. The economics of HR gasifier integration in varying operations under real refinery conditions remain to be explored. Full article

(This article belongs to the Special Issue Editorial Board Members’ Collection Series – Energy Resources: Past, Present and Future Role in a Circular Economy)

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Open AccessArticle

Identifying Optimal Cell Size for Geodiversity Quantitative Assessment with Richness, Diversity and Evenness Indices

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Catarina Lopes

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Zara Teixeira

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Diamantino I. Pereira

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Paulo Pereira

Resources 2023, 12(6), 65; https://doi.org/10.3390/resources12060065 - 26 May 2023

Abstract

The importance of quantitatively assessing the spatial patterns of geodiversity, and their intrinsic relationship with biodiversity and the ecosystem services provided to society, has been signalized by several authors, due to the relevance of this information in territorial management, the planning of environmental [...] Read more.

The importance of quantitatively assessing the spatial patterns of geodiversity, and their intrinsic relationship with biodiversity and the ecosystem services provided to society, has been signalized by several authors, due to the relevance of this information in territorial management, the planning of environmental and conservation strategies. Within geodiversity method assessments, the grid system is the most widely used GIS spatial approach to calculate a geodiversity index. Preferred for its simplicity, it implies the fundamental decision of choosing the scale of the analysis, defined by the selection of cell size, determinant for the accuracy and correctness of the final maps. Although this topic has been occasionally approached by some authors within geodiversity assessments, there is no formal procedure for cell size selection. This is a key issue, and, in the scope of the present work, an empirical procedure to select optimal cell size(s) was tested on the national scale in Portugal, in lithology and geomorphology datasets. The quantitative method based on geodiversity indices was applied, using richness, diversity and evenness indices, in a hexagonal analytical grid, through eight cell dimensions. Several descriptive statistical parameters were analyzed, with particular emphasis on dispersion statistical measures. Optimal cell size corresponded to the minimum cell size, once dispersion values were significatively reduced or stabilized, and distributions from evenness and diversity indices were closer to symmetry, which provided more accurate results and higher spatial differentiation, although the final decision should always consider the main purposes of the analysis. Full article

(This article belongs to the Special Issue Geodiversity Assessment: What, Why and How?)

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Open AccessArticle

Conceptual Management Framework for Oil and Gas Engineering Project Implementation

by

Pavel Tsiglianu

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Natalia Romasheva

and

Artem Nenko

Resources 2023, 12(6), 64; https://doi.org/10.3390/resources12060064 - 25 May 2023

Abstract

More than half of the global demand for energy resources is covered today by oil and natural gas, and according to various forecasts, it is expected to grow 1.5–2 times greater over the next 30–50 years. This creates serious prospects for the development [...] Read more.

More than half of the global demand for energy resources is covered today by oil and natural gas, and according to various forecasts, it is expected to grow 1.5–2 times greater over the next 30–50 years. This creates serious prospects for the development of the national oil and gas sectors of various countries, including Russia. Modern industry challenges create significant restrictions for the development of Russian oil and gas resources, and considering their predominant technological nature, the key solution is the increase in internal technological potential, in particular through the implementation of engineering projects aimed at creating the necessary technological solutions. This article presents an approach to the development of a conceptual management framework that will allow for the effective implementation of oil and gas engineering projects. The methodology of the research includes desk studies, systematization, the expert method (including interviews and questionnaires), grouping, generalization, and algorithm design techniques. The results of the study showed that effective implementation of engineering projects should be based on a systematic management approach, one of which is the TRA process. This article analyzes the TRA methods, on the basis of which key project readiness indicators are identified. Based on a literature review and the expert method, the relevant readiness indicators necessary for the assessment of oil and gas engineering projects are substantiated. Given these indicators, the authors proposed a framework for a comprehensive readiness assessment of oil and gas engineering projects and developed an algorithm for management decision-making on project implementation. Full article

(This article belongs to the Special Issue Resource Provision of the Sustainable Development under Global Shocks: 2022 Viewpoint)

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Open AccessArticle

A Conceptual Model for the Sustainable Development of the Arctic’s Mineral Resources Considering Current Global Trends: Future Scenarios, Key Actors, and Recommendations

by

Diana Dmitrieva

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Amina Chanysheva

and

Victoria Solovyova

Resources 2023, 12(6), 63; https://doi.org/10.3390/resources12060063 - 25 May 2023

Abstract

Today, the issues of sustainable development are among the most pressing ones. They are particularly relevant in the context of mineral resource development as operations in this sector always have an impact on the environment and socioeconomic development. Developing the mineral resource base [...] Read more.

Today, the issues of sustainable development are among the most pressing ones. They are particularly relevant in the context of mineral resource development as operations in this sector always have an impact on the environment and socioeconomic development. Developing the mineral resource base of the Arctic presents a difficult task, as it requires finding a balance between the growing demand in resources and the acute climatic and geopolitical challenges. In view of both the specific features of the region and the pressure caused by various trends and challenges, ensuring the sustainable development of the Arctic’s mineral resource base is highly important. In 2022, the global landscape that consists of sustainable development trends, ESG agendas, and environmental awareness was supplemented by national import substitution policies introduced in many strategic industries, which led to an inevitable increase in demand for mineral resources. This substantiates the importance of the research goal—developing a model for the sustainable development of the Arctic’s mineral resource base that will produce quantitative results and provide key actors with reasonable recommendations for restructuring the priority areas of development. Full article

(This article belongs to the Special Issue Resource Provision of the Sustainable Development under Global Shocks: 2022 Viewpoint)

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Open AccessArticle

Life Cycle Assessment (LCA) of Two Different Oyster (Crassostrea gigas) Farming Strategies in the Sacca di Goro, Northern Adriatic Sea, Italy

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Resources 2023, 12(6), 62; https://doi.org/10.3390/resources12060062 - 23 May 2023

Abstract

The Pacific oyster Crassostrea gigas is one of the world’s most cultivated and prized molluscs. Although it is usually considered a luxury product, it meets all the requirements to be included in a sustainable diet, and its production and consumption have great potential [...] Read more.

The Pacific oyster Crassostrea gigas is one of the world’s most cultivated and prized molluscs. Although it is usually considered a luxury product, it meets all the requirements to be included in a sustainable diet, and its production and consumption have great potential for growth in the coming years. Oyster farming is a worldwide activity, with China and France as the main producers, but recently, the possibility of implementing the Italian production, mainly focused on clams and mussels, has been considered an interesting issue, especially due to the growing local and global demand. The present study has been carried out by collecting data from the Sacca di Goro, north-east Italy, the most important national mollusc farming area. Life cycle assessment (LCA) methodology was applied to two different farming scenarios in order to improve the overall sustainability of the process. Using OpenLCA™ software (GreenDelta, Berlin, Germany) and the ReCiPe^® midpoint (H) v.1.12 method, the environmental impacts of the traditional Italian farming technique, carried out entirely offshore in longlines, and the alternative option, in which the oyster seed pre-fattening phase was carried out in the lagoon, were calculated and compared. The results show that replacing the current pre-fattening phase with pre-fattening in a lagoon reduces CO₂ emissions by approximately 12% and all other impact categories by approximately 9%. In addition, non-recyclable plastic materials and fuel consumption emerged as the main environmental hotspots. Full article

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Open AccessArticle

Promoting Geosites on Web-Pages: An Assessment of the Quality and Quantity of Information in Real Cases

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Resources 2023, 12(5), 61; https://doi.org/10.3390/resources12050061 - 22 May 2023

Abstract

Geological information present on web-pages determines the efficacy of the online marketing of geosites. In this paper, a new approach aimed at an easy and quick assessment of geosite-focused web-pages is proposed. It is based on scoring by several criteria reflecting the quality [...] Read more.

Geological information present on web-pages determines the efficacy of the online marketing of geosites. In this paper, a new approach aimed at an easy and quick assessment of geosite-focused web-pages is proposed. It is based on scoring by several criteria reflecting the quality and the quantity of geological information. Attention is paid to the simplicity and correctness of information, mention of technical properties (accessibility, location, and safety), relative and absolute amounts of information, and adaptation to persons with disabilities. Textual and graphical elements are considered differently. The approach is tested in three cases, namely, the Granite Gorge in the Western Caucasus, Pechischi in the Volga Region, and the Red Stones in the Southern Ciscaucasus. These are well-known geosites already used as important (geo)tourist attractions. It is established that the web-pages devoted to them chiefly allow minimally perfect promotion. Some examples of misinterpretations of geological information and errors are specially considered. The approach seems to be promising, and its application allows finding the deficiencies of web-pages, an improvement of which will enhance geosite promotion. Cooperation between representatives of the tourism industry and geological faculty members of local universities or administrations of protected areas is reasonable to create more informative geosite-focused web-pages. Full article

(This article belongs to the Special Issue Geosites as Tools for the Promotion and Conservation of Geoheritage)

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Open AccessEditorial

Integration of Water Quantity/Quality Needs with Socio-Economical Issues: A Focus on Monitoring and Modelling

by

Diego Copetti

Resources 2023, 12(5), 60; https://doi.org/10.3390/resources12050060 - 18 May 2023

Abstract

Freshwater is essential for a multitude of different uses, including drinking supply, irrigation, and energy production [...] Full article

(This article belongs to the Special Issue Advances in Water Resource Monitoring and Modelling: Water Quantity and Quality Issues)

Open AccessArticle

Quantifying Geodiversity at the Continental Scale: Limitations and Prospects

by

Paweł Wolniewicz

Resources 2023, 12(5), 59; https://doi.org/10.3390/resources12050059 - 17 May 2023

Abstract

Geodiversity, defined as the natural range of geological, geomorphological, hydrological, and soil features, has been explored in a growing number of studies at different spatial scales. However, most research efforts have been directed at analysing geodiversity at a fine-scale. Here, an estimation of [...] Read more.

Geodiversity, defined as the natural range of geological, geomorphological, hydrological, and soil features, has been explored in a growing number of studies at different spatial scales. However, most research efforts have been directed at analysing geodiversity at a fine-scale. Here, an estimation of the geodiversity of the European subcontinent is performed using six available high-resolution global data sets that describe the diversity of selected features of the abiotic environment. Six maps representing geomorphological, geological, hydrological, hydrogeological, soil, and topographical diversity are compiled using the methods of centroid analysis and kernel density estimation. The present contribution identifies areas with high values of most geodiversity variables which were not previously studied, nor are included in the network of international geoparks. The study also shows that, although remote sensing images and digital elevation models allow one to grasp a significant understanding of geodiversity on the continental scale, fine-resolution and process-oriented geological data sets are required to further enhance the quality of large-scale geodiversity assessments. To ensure interoperability between studies, a consensus is necessary regarding the analytical methods, classification rules, standardised indices and dictionaries. Without this, comparisons of geodiversity evaluations across different scales and between distant study areas remain difficult. Full article

(This article belongs to the Special Issue Geodiversity Assessment: What, Why and How?)

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Graphical abstract

Open AccessArticle

Contribution of Landscape Transformation in the Development of Heat Islands and Sinks in Urban and Peri-Urban Regions in the Chota–Nagpur Plateau, India

by

Amit Kumar

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Manjari Upreti

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Arvind Chandra Pandey

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Purabi Saikia

and

Mohammed Latif Khan

Resources 2023, 12(5), 58; https://doi.org/10.3390/resources12050058 - 09 May 2023

Abstract

Cities in the contemporary world are experiencing shifts in local climatic conditions that are primarily linked to rapid urban growth, carbon emissions, and environmental degradation. In the present study, land surface temperature (LST) in urban and peri-urban regions of the city of Ranchi [...] Read more.

Cities in the contemporary world are experiencing shifts in local climatic conditions that are primarily linked to rapid urban growth, carbon emissions, and environmental degradation. In the present study, land surface temperature (LST) in urban and peri-urban regions of the city of Ranchi was estimated and correlated with land use/land cover (LULC) using temporal LANDSAT satellite images from 2000 to 2014 on a bi-annual basis. The study exhibited a gradual increase in built-up land with total growth of 47.65 sq. km (135%) at the cost of vegetation (−6.8%), rock outcrops (−44.16%), and other LULCs (0.81%). Spatiotemporal LST variability exhibited an increase in area under high-temperature (>38 °C) zones as compared to moderate (30 °C to 38 °C) and low-temperature (<30 °C) zones. Although the LST distinctively escalated in all LULC in the month of May from 2000 to 2014, urban areas exhibited cooler conditions than their environs at a regional scale, except for 2006. A higher surface temperature was observed over bare rock (min/max: 28–43 °C), fallow land (25–42 °C), and industrial built-up areas (31–43 °C), followed by vegetation (24–34 °C) and waterbodies (22–30 °C). The rapid land transformation to an impervious surface, degradation of vegetation coverage and its health, deforestation due to urbanization, the dumping of non-treated wastewater into reservoirs, and pollution altogether led to an increase in urban heat islands (UHI). The study demonstrated that the LST increased in urban regions but appeared cooler than those of its peri-urban counterparts because of the presence of barren land and rock outcrops. The existing tenancy act had an indirect impact on maintaining natural landscapes and controlling the LST within the Ranchi region. The study recommends nature-based solutions in terms of plantation and green roofing within the rising LST zones located in the urban core and in peripheral rock outcrops collectively to minimize the rising impact of LST in urban and peri-urban regions. Full article

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Open AccessArticle

Economic Activities and Management Issues for the Environment: An Environmental Kuznets Curve (EKC) and STIRPAT Analysis in Turkey

by

Mortaza Ojaghlou

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Erginbay Ugurlu

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Marta Kadłubek

and

Eleftherios Thalassinos

Resources 2023, 12(5), 57; https://doi.org/10.3390/resources12050057 - 30 Apr 2023

Abstract

The emission of air pollutants from energy production and consumption is a major cause of environmental problems. In addition, urbanisation and CO₂ emissions have become major environmental concerns that are closely related to climate change and sustainable economic growth. The purpose of [...] Read more.

The emission of air pollutants from energy production and consumption is a major cause of environmental problems. In addition, urbanisation and CO₂ emissions have become major environmental concerns that are closely related to climate change and sustainable economic growth. The purpose of this paper is to investigate the long-run relationship among CO₂ emissions, energy consumption, economic activities, and management issues for Turkey for the period between 1980 and 2021. The STIRPAT hypothesis and the environmental Kuznets curve (EKC) hypothesis were employed by using dynamic conditional correlation (DCC) and ARDL bound methodologies for these goals. The findings indicate that there is a long-run relationship between variables of the STIRPAT model. The coefficient of economic expansion and energy consumption affected CO₂ emissions positively, which means that energy consumption and the expansion of economic activity have significant effects on environmental degradation. Those results are also confirmed by the environmental Kuznets curve (EKC) model. In addition, the N-shaped environmental Kuznets curve (EKC) is developed for Turkey. The DCC model also shows that economic growth increases CO₂ emissions significantly, and energy productivity can be considered for decreasing CO₂ emissions. Full article

(This article belongs to the Special Issue Decision Making in Resources Management: Problems, Methods and Tools)

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Open AccessArticle

Strengthening Reclamation Obligation through Mining Law Reform: Indonesian Experience

by

Nurul Listiyani

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M. Yasir Said

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Afif Khalid

Resources 2023, 12(5), 56; https://doi.org/10.3390/resources12050056 - 28 Apr 2023

Abstract

Reclamation can produce more value for the environment and create a far better situation than post-mining conditions. While the reclamation obligation policy is a great way to introduce a restorative approach to the environment, the main problem is the disobedience of the mining [...] Read more.

Reclamation can produce more value for the environment and create a far better situation than post-mining conditions. While the reclamation obligation policy is a great way to introduce a restorative approach to the environment, the main problem is the disobedience of the mining companies in their reclamation obligation. Therefore, we focused on conceptualizing the strengthening of the reclamation obligation policy in the Mining Act based on the understanding of preventing environmental and social damage. This research is conducted in doctrinal legal studies to create a prescriptive result. Despite the 2020 Mining Act Revision, Indonesia is still facing the previous legal issue due to blind spots in the regulatory framework. Ranging from the continuous conflicts between the mining company and the local community to the problem of non-compliance with the reclamation policy, which has resulted in excavation holes that were left untreated and abandoned, which has created casualties over the years. We offer two major reforms in formulation to strengthen the reclamation obligation. First, is the need to reinforce the essence of “obligation” for IUP and IUPK holders to perform reclamation and post-mining with supervision, as in the Environmental Act. With this formulation, the placement of the reclamation fund by the company does not eliminate the company’s obligation to carry out reclamation and post-mining activities. Second, for the company to comply with placing reclamation and post-mining funds, it is crucial to implement a mandatory condition, whereby the placing of a reclamation guarantees fund is a requirement for approval of the mining plans and budgets (the RKAB), and Clean and Clear (CnC) Certification. Therefore, the reform will cause a shift and strengthen the values of obligation in post-mining reclamations. Full article

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Open AccessArticle

New Lime-Based Hybrid Composite of Sugarcane Bagasse and Hemp as Aggregates

by

Arlen Zúniga

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Rute Eires

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Raphaele Malheiro

Resources 2023, 12(5), 55; https://doi.org/10.3390/resources12050055 - 27 Apr 2023

Abstract

Bio-based materials help reduce the consumption of non-renewable resources, contributing to the development of sustainable construction. Industrial Hemp Concrete (IHC), which uses hemp stalk (HS) as an aggregate and a lime-based binder, is a bio-based material with various applications. This research developed a [...] Read more.

Bio-based materials help reduce the consumption of non-renewable resources, contributing to the development of sustainable construction. Industrial Hemp Concrete (IHC), which uses hemp stalk (HS) as an aggregate and a lime-based binder, is a bio-based material with various applications. This research developed a new hybrid composite in order to improve the mechanical strength and durability of hemp concrete, with the incorporation of sugarcane bagasse (SCB) as an aggregate, a resource of a renewable origin that is abundant in several countries. Different formulations were used, which were molded and pressed manually, evaluating their cohesion and compactness. The performance of the developed hybrid composite was measured considering mechanical, thermal, and durability properties. The compression test results showed an increase of 19–24% for composites with 75% hemp and 25% SCB. Thermal conductivity and thermal resistance coefficients were also improved, reaching 0.098 (W/m °C) and 0.489 (m² °C/W), respectively. This aggregate combination also showed the lowest water absorption coefficient (reducing by 35%) and the best performance in durability tests compared to IHC. The resistance to freeze–thaw is highlighted, increasing 400%. The main reason is the influence of the SCB addition because the short and thin fiber form helps to maintain the physical integrity of the composite by filling the spaces between the hemp aggregates. Full article

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Open AccessArticle

The Time-Varying Effects of Oil Shocks on the Trade Balance of Saudi Arabia

by

Mohamad Husam Helmi

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Mohammed I. Abu Eleyan

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Abdurrahman Nazif Çatık

and

Esra Ballı

Resources 2023, 12(5), 54; https://doi.org/10.3390/resources12050054 - 25 Apr 2023

Abstract

This study aims to analyze the impact of oil shocks on the external balance of Saudi Arabia, as one of the largest net oil-exporting countries. To this end, a time-varying parameter vector autoregression model (TVP-VAR) is estimated by using quarterly data covering the [...] Read more.

This study aims to analyze the impact of oil shocks on the external balance of Saudi Arabia, as one of the largest net oil-exporting countries. To this end, a time-varying parameter vector autoregression model (TVP-VAR) is estimated by using quarterly data covering the period between 1991: Q1 and 2021: Q4. We find that identifying the source of shocks plays an important role in understanding the time-varying impact of shocks on its economy. Our findings indicate that the global oil production shocks excluding Saudi Arabia have a negative and significant impact on the trade balance and are greater than the impact of the Saudi oil production shocks, which is not significant for most of the period. In addition, we found that oil price shocks have more profound and much greater impacts than global and domestic oil supply shocks. This may be attributed to the fact that oil price shocks are more than oil supply shocks, and supply shocks are linked to oil price shocks. However, impulse responses show that the effects of oil shocks are volatile over time and their effects are generally more pronounced during and immediately after global shocks. Our findings have serious implications for the trade balance of Saudi Arabia, particularly in the low and volatile oil price environment. Full article

(This article belongs to the Special Issue Security, Policy and Political Economy of Energy and Minerals)

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Open AccessArticle

System Dynamics Modelling: Integrating Empty Fruit Bunch Biomass Logistics to Reduce GHG Emissions

by

Iffat Abbas Abbasi

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Hasbullah Ashari

and

Ijaz Yusuf

Resources 2023, 12(4), 53; https://doi.org/10.3390/resources12040053 - 18 Apr 2023

Abstract

The world is shifting toward renewable energy sources due to global warming and rising GHG emissions. Malaysia has joined other nations in the conference of parties to develop policies for the reduction of GHG and carbon emissions. Malaysia is switching towards sustainable, eco-friendly [...] Read more.

The world is shifting toward renewable energy sources due to global warming and rising GHG emissions. Malaysia has joined other nations in the conference of parties to develop policies for the reduction of GHG and carbon emissions. Malaysia is switching towards sustainable, eco-friendly and renewable energy sources. EFB biomass, one of the by-products of palm oil, has enormous potential as a sustainable energy source. Malaysia, one of the top exporters of palm oil, is unable to employ EFB-biomass-based power generation due to storage, logistics and supply-chain-related constraints. Therefore, this study integrates EFB biomass supply-chain logistics to overcome the reported challenges. The current study employs the system dynamics (SD) approach to achieve the objectives as it explains the dynamics of interaction and behaviour among the sub-systems. A document-based model-building approach is employed to collect data to develop the base model. The document-based model-building approach and system dynamics modelling facilitates the achievement of two outcomes: integrated EFB biomass logistics and GHG reduction using EFB. These outcomes are crucial to enhancing the base model and realizing the zero-carbon emission goal to contribute to sustainable development goals. Full article

(This article belongs to the Special Issue Women's Special Issue Series: Sustainable Resource Management)

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Open AccessArticle

Human Capital and Environmental Sustainability Nexus in Selected SADC Countries

by

Kin Sibanda

,

Dorcas Gonese

and

Rufaro Garidzirai

Resources 2023, 12(4), 52; https://doi.org/10.3390/resources12040052 - 18 Apr 2023

Abstract

This paper sought to examine the nexus between human capital and environmental sustainability in Southern African Development Community (SADC) countries. This contemporary topic has not received much attention in the region, hence the need to investigate the nexus between human capital and environmental [...] Read more.

This paper sought to examine the nexus between human capital and environmental sustainability in Southern African Development Community (SADC) countries. This contemporary topic has not received much attention in the region, hence the need to investigate the nexus between human capital and environmental sustainability. The paper used one of the most recent methodologies, namely, the pooled mean group (PMG) estimation technique, to assess this relationship from 1980 to 2021. The findings of the study are that human capital increases environmental sustainability in the long run in SADC countries. This implies that as human capital increases, countries will see an increase in technological innovations and research and development (R&D), enabling the mitigation of environmental degradation in the region. Therefore, it is imperative for the region to embark on human capital programs that improve environmental sustainability. Full article

(This article belongs to the Special Issue Decision Making in Resources Management: Problems, Methods and Tools)

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