Affordable Energy Research Articles

Harnessing biomass waste-to-energy for sustainable electricity generation: prospects, viability, and policy implications for low-carbon urban development

AbstractBiomass waste-to-energy (WtE) generation is a potential pathway for green urban transition in developing countries which can contribute significantly to sustainable development goal 7: affordable and clean energy. However, unlike fossil fuel energy systems, the economic returns from WtE systems are low because WtE generation is capital-intensive and requires subsidies. This study examines the prospects of a sustainable biomass electricity generation from rice husk (RH) using a large dataset of rice milling activities in a fast paced urban transition economy. The study analyzes the viability of several RH biomass electricity generation scenarios using indicators such as net electricity output, economic returns (benefits), and levelized cost of electricity (LCOE). The results show that several mills/mill clusters generate sufficient daily RH that can power between 0.8 and 2.2 MW plant with a combined electricity output of about 500,000 MWh per annum. The economic analyses show that all RH biomass electricity generation scenarios return positive economic benefits under reduced social discount rates of 2–6%. Moreover, the LCOE of all scenarios are less than those of electricity generated from other sources. These results demonstrate that biomass waste-to-energy generation is viable for green urban development through low-carbon decentralized energy systems. Several policy implications of the findings are highlighted, including the need for policymakers and energy stakeholders to adopt sustainable biomass energy generation models such as “design, build, and operate” (DBO) to achieve sustainable WtE generation regimes that ensure green urban transition. Such a model will contribute to a circular economy and facilitates sustainable urban development that satisfies climate-related SDGs. Graphic abstract

Current development, optimisation strategies and future perspectives for lead-free dielectric ceramics in high field and high energy density capacitors.

To meet the United Nations' sustainable development goal of affordable and clean energy, there has been a growing need for low-cost, green, and safe energy storage technologies. High-field and energy-density capacitors have gained substantial attention from academics and industry, particularly for power electronics, where they will play a key role in optimising the performance of management systems in electric vehicles. The key figure of merit, energy density (Wrec), for high-field applications has dramatically increased year-on-year from 2020 to 2024, as evidenced by over 250 papers, demonstrating ever larger Wrec values. This review briefly introduces the background and principles of high energy density ceramics, but its focus is to provide constructive and comprehensive insight into the evaluation of Wrec, Emax, ΔP, and η, and more importantly, the normalised metrics, Wrec/Emax and Wrec/ΔP in lead-free dielectric ceramics. We also present several optimisation strategies for materials modification and process innovation that have been recently proposed before providing perspectives for the further development of high-field and high-energy density capacitors.

Greenwashing by the fossil fuel industry: impediments to SDGs

Abstract The fossil fuel industry, a major commercial determinant of public and environmental health, constitutes a central challenge to the achievement of the SDGs. Motivated by profit, the industry has contributed to establishing the current global reliance on fossil fuel as the primary energy source and essential raw material in global production. Major oil companies have purposefully hindered the research and transition towards renewable energy. This was achieved through an intricate web of interference and mechanisms that fall under the corporate playbook, such as political interference through lobbying to stagnate carbon emission reduction, influences on carbon pricing policies, and hinderances to environmental protection legislation. These practices known as ‘greenwashing’ have resulted in misinformation, interfered with climate action in an aim to increase demand for their products, to decrease the pressure from society on the industry, and portray a green image to consumers. Using the commercial determinants of health framework and focusing on the Middle East, this presentation will illustrate how fossil fuel companies falsely advertise their products as environmentally friendly, resulting in environmental degradation, and impede the achievement of most SDGs, especially SDG 3 (good health and wellbeing), SDG 7 (affordable and clean energy), and SDG 13 (climate action).

Innovation in distributed energy services for sustainable development: case studies from sub-Saharan Africa

Abstract In this work, we explore how locally led innovations can advance sustainable energy access in low-income regions of Africa. Given the emphasis of the Sustainable Development Goals on the importance of affordable, reliable, and sustainable energy, we critically assess how local innovations can address the unique challenges of regions characterized by informality and low purchasing power and where existing grid-based electricity supply is weak. Through case studies, we highlight successful initiatives in expanding energy services access, including product bundling, pay-as-you-go financial models, leveraging existing supply chains, and securing strong funding support. Our findings underscore the importance of local ownership, contextual knowledge, and the adaptation of innovations to specific socio-economic and cultural conditions. By comparing the case studies, we identify common strategies that can contribute to the effectiveness of local innovations in improving energy access and sustainability that can inform efforts to replicate and scale up such initiatives. We conclude by identifying common elements contributing to the success of these cases and their significance, focusing on those crucial for achieving speed, scale, and impact.

7.C. Scientific session: Commercial determinants of health: impeding attainment of the Sustainable Development Goals

Abstract The commercial determinants of health (CDOH) and the adverse impacts they have on health equity globally, have recently emerged as an innovative growing field of research in public health. The corporate playbook comprises a myriad of strategies and tactics that aim to enhance profitability for the commercial actors, while harming health and posing grave risks to planetary health for current and future generations. The literature however, rarely explicitly makes the connection between commercial determinants and the impact they have on the attainment of the Sustainable Development Goals (SDGs) set out by the United Nations in 2015. This workshop aims to use the commercial determinants of health framework as a new approach to draw attention to, and make linkages between, commercial determinants and the challenges they pose to the attainment of several if not all the global SDGs. The four presentations showcase exemplars of the commercial determinants to include the firearms industry, fossil fuel industry, food industry and the tobacco industry focusing on impacts in low- and middle-income countries (LMICs). The workshop will start with a brief overview of the CDOH framework, their corporate playbook, and the progress in SDG attainment globally while presenting the first case on the firearms industry trade impacting armed conflicts that impede SDG 3 (good health and wellbeing), 10 (reduced inequalities), and 16 (peace, justice and strong institutions). The second presentation will discuss how the fossil fuel industry uses greenwashing tactics to conceal its harmful activities thereby compromising SDGs 7 (affordable and clean energy), 11 (sustainable cities and communities), and 13 (climate action). The third presentation will address how the tobacco industry impedes the advancement of SDG 3, 8 (decent work and economic growth), 13 (climate action) and 17 (partnerships for the goals) perpetuated by national system level attributes. The last presentation will showcase how the food industry challenges SDG 3 in its production of ultra-processed foods. The workshop will draw on evidence from LMICs, but is also eye opening for high-income countries of Europe which face industry interference in social and health policymaking progress in SGD attainment. The audience will be engaged in a short warm-up exercise at the start of the workshop through an app for real-time feedback accessed through a QR code on the screen, and will interact with the presenters at the end of the workshop if time permits. Key messages • All commercial actors pose a direct or indirect threat to progress in attaining the SDGs. • The commercial determinants of health pose are in direct contradiction to the SDG 17 through their corporate playbook.

A New Approach to Measuring Institutional and Researcher Contributions to the SDGs: Combining Data from Elsevier SciVal and VOSviewer

The Sustainable Development Goals (SDGs), established by the United Nations in 2015, are a comprehensive global framework that addresses social, economic, and environmental challenges through sustainable development. This study examines the role of universities, specifically focusing on the Department of Mechanical Engineering at Universitas Muhammadiyah Magelang (UNIMMA), in contributing to the SDGs. The study utilized data from Elsevier’s SciVal to analyze the department’s contribution to the SDGs through scientific publications in the Scopus database. A total of 97 out of 156 articles published by nine researchers from the department were found to contribute to various SDGs, with a significant focus on Goals 7 (affordable and clean energy), 17 (partnerships for the goals), 9 (industry, innovation, and infrastructure), and 12 (responsible consumption and production). The study highlights the department’s collaborative efforts and alignment with global sustainability goals. In addition, VOSviewer was used to map the research collaboration network within the department, revealing strong contributions to energy efficiency, sustainable technologies, and climate action. However, the department's research shows limited contribution to social SDGs such as poverty alleviation and gender equality. By mapping the university’s contributions to the SDGs, this study helps faculty members identify opportunities for targeted research collaborations, address gaps in SDG contributions, and enhance partnerships with researchers from other institutions, thus broadening the university’s impact on global sustainable development goals.

TACIT EVASION OR A MISPLACED POLICY GAZE: A POLITICAL ECOLOGY OF THE DEFORESTATION AND CHARCOAL CONUNDRUM IN MALAWI

ABSTRACT Although banned in many countries, charcoal production remains a key driver of deforestation in Africa, yet a livelihood source for many, with evidence showing the practice has risen to unprecedented levels. While rural poverty is often framed as the driver, the rise in charcoal consumption among a burgeoning urban population suggests a multiplicity of drivers. Using in-depth interviews with diverse stakeholders in Malawi, this paper examined the underlying drivers of the charcoal conundrum. Although poverty is indeed a driver, our findings suggest the charcoal conundrum is rooted in complex sociopolitical dynamics and class relations at multiple scales. Charcoal production, a highly stigmatized economic activity at the rural scale, is the key source of fuel for a burgeoning urban population lacking affordable alternative energy sources. Our findings further reveal what we theorize as “hierarchical corruption,” featuring an elite class of “big charcoal dealers” who pay bribes to freely transact charcoal while rural people continue to be disproportionately targeted with draconian forest laws. These dynamics suggest a tacit evasion of the real drivers of deforestation and a misplaced policy gaze in forest governance. Contemporary forest policy must look “beyond forest” to address both production and consumption side drivers of deforestation, particularly poverty, and the lack of clean energy alternatives.

AI-Assisted Automated Identification of Human Activities Using Ficus religiosa Leaf-Based Triboelectric Nanogenerator.

Movement monitoring and effective identification of different actions are the keys that help in fitness services, health status, clinical studies, etc. In this technological era, Internet of Things (IoT) technologies, including smart wireless devices and sensors, are very effectively used for monitoring human activities, but the demand for sustainable and green power sources is a crucial issue with these devices. Triboelectric nanogenerators (TENG) are proven to be promising applications in these devices because they harvest energy from the surrounding environment and eliminate the use of batteries as power sources. As a green energy source, this study emphasizes the fabrication of biodegradable materials-based TENGs, which are eco-friendly and are related to clean and green energy as per the UN's sustainable development goals SDG 7 (affordable and clean energy). In the present work, a natural Ficus religiosa leaf (FRL) of the F. religiosa tree is used in designing and fabricating a TENG (FRL-TENG). Also, an approach is discussed to compare the performance of FRL-TENG with TENGs fabricated from other waste biodegradable materials such as garlic tunic, onion tunic, and eggshell membrane (ESM). During the experimental study, it is observed that the FRL-based TENG produced maximum voltage in comparison to other material combinations selected in this study. The generated electric output from these TENG combinations is also used to power an array of tens of green-light-emitting diodes (LEDs). Furthermore, this paper also proposes the use of FRL-TENG as a wearable sensor to collect information and monitor the physical activities of the user, viz., walk, jump, and run. To recognize the movement status, the FRL-TENG sensor is integrated with an extra randomized tree-based machine learning model for accurately distinguishing the user's three activities with an accuracy of 96%. The work showcases an innovative approach to encourage customized uses of TENG sensors in human motion monitoring and permits the development of intelligent, self-powered systems for new applications.

Linking sustainability reporting and energy use through global reporting initiative standards and sustainable development goals

AbstractThis paper addresses the critical need for an integrated approach to sustainability reporting by examining the transition from internal combustion engine vehicles to electric vehicles within the automotive industry. By focusing on the top 8 highest-revenue global automakers in 2022, the study utilizes the Global Reporting Initiative (GRI) standards and United Nations Sustainable Development Goals to assess contributions to SDG 7 (affordable and clean energy) and other pertinent indicators. A comprehensive content analysis and logistic regression analysis are employed to explore the correlation between energy use and compliance with GRI standards from 2018 to 2022. The findings reveal significant trends in sustainability reporting, with a noted decrease in quality in the final year analyzed. Specifically, GRI 302-3 (energy intensity) shows a significant negative relationship with energy consumption, indicating higher energy usage correlates with lower compliance. The study reinforces the necessity for more transparent and effective sustainability reporting frameworks to enhance corporate practices and drive progress toward sustainability goals. Graphical abstract

Multielectron Transfer in Halogen Batteries

AbstractMultielectron transfer in halogen batteries is a promising solution in pursuing high‐energy‐density and affordable energy storage systems. Interest in rich chemistries derived from unique valence electron structures of halogens is surging in electrode material design. However, deploying multielectron transfer chemistry comes with challenges, including limited redox reactivity and degrees of electrochemical irreversibility, which contribute to poor charging and cycling. To address these challenges, researchers explore physical/chemical strategies to activate high valence reactions and more electron transfer numbers and fix unstable valence state species through electrolyte and electrode regulation. This Concept presents the basic understanding of multielectron transfer electrochemistry concerning theoretical energy capabilities and electronic configuration evolutions. We divide multielectron transfer into two types: single and multi‐redox centers, providing an overview of the current development of multielectron transfer and hoping it will spur more intensive efforts towards a diverse energy future.

Optimising Energy Efficiency in Offshore Buildings: Supporting SDG 7 - Clean and Affordable Energy

The offshore oil and gas sector faces significant challenges in reducing its carbon footprint while meeting global energy demand. Offshore structures consume up to 500 MW of energy per day. Despite the potential for 30-40% energy savings with efficiency technologies, only 25% of global platforms implement integrated energy management systems. This study aims to optimize energy efficiency in offshore structures to support SDG 7 - Affordable and Clean Energy. The study uses a multi-method approach, analyzing data from 10 offshore platforms, conducting energy modeling, and cost-benefit analysis. The results show variability in daily energy consumption (423.7 ± 32.5 MW) with key factors such as hydrocarbon production and environmental conditions. Energy efficiency technologies such as hybrid power generation systems and Integrated Energy Management Systems (SMET) show significant potential for savings. The optimization model shows a total potential energy savings of 37.2 ± 2.1%. Economic analysis using Monte Carlo simulations confirms the feasibility of investment with positive NPV for all evaluated technologies. SMET has the most favorable risk-return profile with a mean NPV of 5.8 ± 0.7 million USD. These findings provide important insights for operators and policymakers, emphasizing the importance of a holistic approach to energy management in offshore structures. Implementation of the proposed energy efficiency strategies can contribute significantly to climate change mitigation and the achievement of SDG 7.

Utilization of Biomass Waste Through Small-Scale Gasification Technology in the Eastern Cape Province in South Africa: Towards the Achievement of Sustainable Development Goal Number 7

Despite being resource-richly endowed with various energy sources, and despite the connection of 89.8% of the households to the grid in South Africa, the Eastern Cape province, as compared to other provinces, has the lowest level of grid connection of about 64.5%. Some of the rural poor households in the Eastern Cape province supplement their free basic electricity with unclean energy alternatives. Using unclean energy alternatives is not only detrimental to the environment and health of the people, but it is a sign of energy poverty and among the contributing factors to depesantization, deagrarianization, and deindustrialization which prolongs the underdevelopment in rural areas. Innovation in energy technologies is a key ingredient in meaningful rural development. The utilization of small-scale biomass gasification technologies can be a solution to the South African energy crisis in rural areas, and it is in line with sustainable development goal number 7, which is about ensuring access to affordable, reliable, sustainable, and modern energy for all. Alternative renewable energy sources cannot be ignored when dealing with the energy crises in South Africa. Renewable energy sources in the country include biomass, solar, wind, and hydropower. Despite its low utilization in the Eastern Cape province, small-scale biomass gasification technology remains pivotal in reducing energy crisis by producing electricity. However, the affordability of biomass gasification technology also plays a role in whether people will accept small-scale biomass gasification technology. The purpose of this paper is to determine the possibilities of using small-scale biomass gasification technology. This paper gives a comprehensive review of small-scale biomass gasification technology potential in the Eastern Cape province and the link between acceptance of small-scale gasification technology and affordability by evaluating the availability of biomass sources in the province and achievements with regards to small-scale biomass gasification. This paper also covers the impact of biomass gasification technology integration in the energy grid, what needs to be taken into consideration before its installation, its benefits and the barriers to its development in Eastern Cape province.

Navigating the Nexus of Artificial Intelligence and Renewable Energy for the Advancement of Sustainable Development Goals

The integration of artificial intelligence (AI) into renewable energy and sustainability represents a transformative approach toward achieving sustainable development goals (SDGs), especially SDG 7 (Affordable and Clean Energy), SDG 9 (Industry, Innovation, and Infrastructure), and SDG 13 (Climate Action). This study utilized the PRISMA framework to conduct a systematic review, focusing on the role of AI in renewable energy and sustainable development. This research utilized Scopus’s curated AI research area, which employs text mining to refine AI concepts into unique keywords. Further refinement via the All Science Journals Classification system and SDG-mapping filters narrowed the focus to publications relevant to renewable energy and SDGs. By employing the BERTopic modeling approach, our study identifies major topics, such as enhancing wind speed forecasts, performance analysis of fuel cells, energy management in elective vehicles, solar irradiance prediction, optimizing biofuel production, and improving energy efficiency in buildings. AI-driven models offer promising solutions to address the dynamic challenges of sustainable energy. Insights from academia-industry collaborations indicate that such partnerships significantly accelerate sustainable-energy transitions, with a focus on AI-driven energy storage, grid management, and renewable-energy forecasting. A global consensus on the critical role of investing in technology-driven solutions for energy sustainability was underscored by the relationship between funding data and global R&D spending patterns. This study serves as a resource for practitioners to harness AI technologies for renewable energy, where for example, AI’s accurate wind speed predictions can increase wind farm efficiency, highlighting the necessity of innovation and collaboration for sustainable development.

Sino-Us Competitive Cooperation Relationship: AIIB’s Projects in Africa and Practical Application of SDGs

Introduction: This article explores the Sino-US competitive cooperation relationship in Africa, focusing on infrastructure development by the AIIB and the DFC. Examining the strategic roles, operational approaches, and impacts of these institutions on African development. It also delves to geopolitical implications, through the African infrastructure, can proves the different trajectory of US and China rivalry in Africa.And also what influences for Sino-US hegemony competition. Using realism and Neo-realism theory as the framework to analysis Sino-US competitive cooperation relationship. And in this article will also talk about the connection between AIIB and DFC investment in Africa and SDG. And how AIIB and DFC investment influence Africa’s SDG to help Africa’s SDGs development. For the Methodology used in this article is qualitative research, can interview some experts in the Africa investment or SDGs development to collect some data and analysis these data. For the research result will also discuss in different factors such as development goals, geopolitical dynamics, Africa’s future prospects. The value of this article is know what is the Sino-US competitive cooperation relationship in Africa, And how these investment help Africa’s development to help Africa achieve SDGs. Like Lake Turkana Wind Power Project in Kenya, is provide affordable and clean energy in Africa, help Africa to achieve No.7 SDGs. Objective: This article aims to analyze how the AIIB and DFC help African infrastructure, and also the development of Africa. Secondly, examining the strategic roles of AIIB and DFC, how these two organizations help the US and China in global competition. Thirdly, to explore the broader geopolitical implications of the Sino-US competitive cooperation relationship in Africa, examining how the activities of AIIB and DFC reflect and influence the geopolitical dynamics between China and the United States. And how AIIB and DFC investment influence Africa achieve SDGs. Theoretical Framework: In this topic, the main concepts and theories that underpin the research are presented. Through realism and Neo-realism stand out, providing a solid basis for understanding the context of the investigation. Method: The methodology adopted for this research comprises is qualitative research method will be used in conducting this research. The qualitative method is used to gather opinions, experiences and thoughts from the research respondents. Data collection was carried out through use interview no matter online or face to face. And also select for some focus group to do the comparison with different factors of the research, and find the connections and how these factors influence with other factors in the research. Results and Discussion: The findings highlight that the contributions of both institutions to African development, emphasizing the complex dynamics that shape their interactions and impact on the continent. And also through the Africa infrastructure how the US and China compete with each other. In the discussion part, it divides as different part to talk about the influence in Africa and Sino-US competition in different periods. Research Implications: The practical and theoretical implications of this article are discussed, providing insights into how the results can be applied or influence practices in the field of Sino-US competitive cooperation relations and how AIIB and DFC investment help Africa to achieve SDGs. These implications could encompass Sino-US relationship, Africa’s development and Geopolitical Dynamics . Originality/Value: This study contributes to the literature by finding how AIIB and DFC investment help Africa’s SDG development in order to try to find Sino-US competitive cooperation way. The relevance and value of this research are evidenced by how the AIIB and DFC investment influence Africa’s develop SDG, and during the process what about Sino-US relations development to prove.

Perspectives on Photocatalytic Paper‐Based Batteries Fueled by Alcohol

AbstractAmid growing energy demands, innovative solutions are essential to power a variety of devices. Paper‐based microfluidic fuel cells (PμFCs), powered by eco‐friendly alcohols derived from biomass, present a promising option. While lightweight and disposable, they mainly rely on costly noble‐metal catalysts for high efficiency. In this context, the concept of photo paper batteries (pPBs), utilizing affordable sunlight‐activated semiconductors to drive alcohol oxidation on paper, opens the possibility to disposable and affordable energy solutions. Our review highlights recent progress in PμFCs fueled by alcohols like methanol, ethanol, ethylene glycol, and glycerol. We explore semiconductor advancements driving anodic reactions and envision the potential of pPBs. To achieve practical pPBs, refining semiconductors, electrode design, and microfluidic engineering are pivotal. This short review highlights the transformative potential of pPBs and beckons researchers to partake in shaping this new field.

Evaluating the Potential of Nature-Based Solutions (NBS) and Solar Energy in Urban Built Environments with Aerial Photogrammetry Dataset

Abstract. The process of urbanisation has a significant impact on climate change, with projections indicating that over 70% of the global population will live in cities by 2050. The challenges associated with climate change impacts on urban areas include urban heat islands, unsustainable water management, floods and air pollution. This study explores the potential of Nature-Based Solutions (NBS) and renewable energy in Torino, Italy, with a particular focus on the exploitation of rooftops for solar panels and green roofs. The data from 159 buildings in San Salvario was collected using aerial photogrammetry. The solar potential was analysed with ArcGIS, taking into account both geographic and building-specific factors. Buildings that were unsuitable for solar panels were identified for green roofs. This research supports the United Nations Sustainable Development Goals 7 (Affordable and Clean Energy), 11 (Sustainable Cities and Communities), 13 (Climate Action), and 15 (Life on Land). The annual solar potential was estimated at 100,300 kWh, with 2,450 m2 of suitable roof area for green roofs. The study demonstrates the feasibility of using rooftops to increase urban sustainability, thereby enhancing the quality of life for residents. The integration of NBS and solar energy can facilitate the creation of more sustainable and resilient urban environments. The study recommends the implementation of spatial-enabled urban planning as a means of overcoming barriers and promoting the development of green, energy-efficient communities.

Utility-Scale Grid-Connected Microgrid Planning Framework for Sustainable Renewable Energy Integration

Microgrids have emerged as a crucial focus in power engineering and sustainable energy research, with utility-scale microgrids playing a significant role in both developed and developing countries like the Philippines. This study presents a comprehensive framework for utility-scale microgrid planning, emphasizing the sustainable integration of renewable energy resources to the distribution grid. The framework addresses the operational modes of grid-connected and islanded microgrids, emphasizing the seamless transition between these modes to ensure a continuous power supply. By leveraging local distributed energy resources, the microgrid aims to reduce dependence on the main transmission grid while enhancing resilience and reliability. The proposed planning framework not only eases the economic burden of constructing renewable energy sources but also aids distribution utilities in maximizing local resources to achieve sustainable energy goals. Through a detailed network analysis and modeling, the framework provides a robust foundation for optimizing the energy mix and enhancing the overall system performance. This research contributes to advancing microgrid technology as a key driver towards achieving UN Sustainable Development Goals, particularly in promoting clean and affordable energy access.

Role of Trap Optimization in a Heterostructure Carbon Nitride as a Methodology to Enhance Photocatalytic Hydrogen Production.

Carbon-based catalysts hold significant promise for photocatalytic hydrogen evolution. A critical challenge lies in optimizing the balance between electron longevity and its accumulation to avoid bottlenecks in photocatalytic efficiency. In this study, we introduce an innovative and efficient strategy for the rapid extraction (<100 fs) of photoinduced free electrons from a carbon-based catalyst without forming additional metal-based heterojunction hybrids. This method effectively prevents excessive accumulation of free carriers within the catalyst. The rapidly extracted electrons are then utilized for photocatalytic hydrogen production, resulting in a 10-fold increase in activity compared to the pristine catalyst, with platinum (3 wt%) used as a cocatalyst. Our strategy significantly enhances the performance of a state-of-the-art catalyst, offering a clean and cost-effective method for producing clean energy. This work demonstrates how a fundamental understanding of molecular-level phenomena and their optimization can pave the way for delivering clean and affordable energy to society.

Doing dams better? A case study of a proposed pumped hydro scheme at Lake Onslow, Central Otago

AbstractWater resource managers and Geographers share common interests in meeting Sustainable Development Goal Seven (universal access to affordable energy) and addressing climate change. Hydropower plays a key role but dams have environmental, social and cultural consequences. The Hydropower Sustainability Assessment Protocol (HSAP) aims to ensure that dams are built safely and potential impacts are understood. This study of a proposed pumped hydro scheme at Lake Onslow in Central Otago, New Zealand, considers the effectiveness of HSAP. Results reported here show that HSAP works well but that it can also be improved by including new groups of stakeholders and by widening the perception of risks.

Determinants of the Relationship between Wholesale and Retail Energy Prices in the Czech Republic

Rising energy prices have become a focus of interest for politicians at the international, European, and national levels. Energy prices are the main determinant of profitability or even the existence of the industrial sector. So, it is accepted that energy policy aims to ensure a secure, sustainable, competitive, and affordable energy supply for households and businesses. However, the recent geopolitical situation has significantly affected the energy policy of the European Union, raising concerns about energy security and an energy crisis. This crisis has had social, economic, and political consequences, including energy poverty. In this context, it is essential to understand the determinants of the relationship between wholesale and retail energy prices. This paper presents a model proposal to be used by the Czech Energy Regulatory Authority. The model of average retail prices depends on the type of contract - spot or forward, with the three-year forward contract having the largest weight on the retail price. Therefore, our study shows that long-term contracts significantly impact retail energy prices, highlighting the importance of regulatory monitoring of market strategies. Methodologically, the model is based on a multivariate regression analysis solved with the least absolute deviations and data for the period 2012 to 2023. The findings of the study contribute to a better understanding of the complexity of the dynamics of energy prices and support policymakers while attempting to ensure energy affordability and sustainability.