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The structure and operating principle of a four-stroke internal combustion engine are usually demonstrated using the cut-away model of an internal combustion engine or its computer animation. However, by observing the operation of the engine mechanism, the understanding of the main essence, which consists of the transformation of thermal energy from the combustion of gasoline into the mechanical energy of the piston movement is lost. This work describes the demonstration of the ignition and combustion of the fuel mixture and the transformation of thermal energy generated by the combustion of gasoline into the mechanical energy of the piston. A paper rocket is used instead of a piston for the spectacle of the experiment. This demonstration does not leave anyone from the audience indifferent. The dependence of rocket flight height on the mass of burned gasoline was established. [ABSTRACT FROM AUTHOR]

This paper provides a legal analysis of the direct line in the legislation of the European Union. The direct line, serving as a legal instrument to implement off-grid solutions, plays a crucial role in amplifying competition within the energy market. Compared to other instruments introduced by the First Liberalization Package in 1992, the direct line is not a subject commonly brought about by legal literature. The core part of legal analyses is divided into two parts, which focus on different approaches of direct line, i.e., European Union and selected Member States (Estonia, Latvia, Lithuania, and Poland). The motives of the Union in establishing the direct line instrument was to support opening the energy market to increase energy generating units. During the transposition of the direct line into national laws, analysed countries have directed the usage of this mechanism to promote renewable energy sources. The presented case studies create a rare pattern of how the Member States form their own interpretations and hence use the Union law in practice, which differs from the direction established in the Union forum. The research focused on legal dogmatic examining of regulations at both European and national levels, with a particular emphasis on the definition part while figuring a crucial role in shaping the direct line concept. The paper also presents other convoluted legal schemes, such as the permit issuance process for direct line construction. The conclusions assess the modifications in the European Union regime, but also their impact on electricity prices and green investments. [ABSTRACT FROM AUTHOR]

In light of China's rapid growth and increasing engagement in the global climate regime, the authoritarian regulatory model has attracted attention from researchers and policymakers alike. This paper examines the question of to what extent and in what way state authoritarianism leads to (un)successful environmental policy implementation in China, with particular attention to energy transformation. This study inter-connects macro and micro inquiries through a case study of nuclear energy policy in China. An examination of the extended policy cycle as a comprehensive process that brings a policy to fruition shows that authoritarian regulatory environmental policy intervenes in each stage, resulting in a particular path of the evolution of environmental policy in nuclearising energy transformation in China. Adding to commonly accepted tenets of authoritarian environmentalism in general, the explanations of Chinese distinctiveness in materialising environmental policy enhances the understanding of the merits and challenges of authoritarian mechanisms of environmental policy. [ABSTRACT FROM AUTHOR]

Purpose: The EU is currently facing an energy transition that is a process affecting entire regions and changing many aspects of reality. The European Green Deal assumes that the transition, which in its consequences may cause so-called "territorial stress,” should be fair, and that citizens and regions affected by the swap will not be left behind”. Energy poverty understood as a situation in which households are unable to access essential energy services and products, is most likely to affect less developed regions – especially coal mining areas in the near future post-mining areas. The goal of this paper is the analysis of adequate energy poverty indicators tailored for post-mining areas- based on the SITRANS project results. Design/methodology/approach: To begin, the review was performed using both the standard method of critical literature review, web-based literature research and a study of academic multidisciplinary databases such as Scopus and Google Scholar. The next step of the research was the mapping of the literature flow around energy transformation. For this mapping, the methodology of VOS-viewer has been used. The last part of the research was focused on indication analysis of adequate energy poverty indicators tailored for post-mining areas. Findings: It was shown that one of the most common approaches to defining energy poverty is to precise it as a situation in which households are unable to access essential energy services and products Additionally it was pointed out, that the ambitious goal of the EU is to be climate-neutral by 2050, an economy with net-zero greenhouse gas emissions requires multilevel and multidimensional changes, what it can cause so-called “territorial stress”. The transition to a decarbonized economy in the EU-27 is expected to result in the loss of approximately 76,000 jobs in coal mines and plants by 2025; the number is expected to double with more than 154,000 job losses projected by 2030. As such the negative effects of energy transformation can contribute to an increase in the level of energy poverty. The performed review indicated that to make sure that no one in this process would be left behind a Just Transition has been set up. At that point correlation between energy transformation, Just Transition and energy poverty has been indicated. It was indicated that energy transformation will affect less developed regions – especially coal mining areas in the near future post-mining areas. The finding of the paper is the proposal of energy poverty for the post-mining areas. Practical implications: The outcomes of the project are going to be used in the SITRANS project. The empirical research is to be conducted in coal regions of Western Macedonia in Greece, Silesia, Poland and Stara Zagora, Bulgaria. The results will allow us to estimate the level of energy poverty and as such will be a base for creating Roadmap for Energy Poverty Alleviation. Originality/value: The paper brings new to the science, as it introduces the energy poverty indicators for post-mining areas. [ABSTRACT FROM AUTHOR]

In this paper, we propose new Metropolis–Hastings and simulated annealing algorithms on a finite state space via modifying the energy landscape. The core idea of landscape modification rests on introducing a parameter c , such that the landscape is modified once the algorithm is above this threshold parameter to encourage exploration, while the original landscape is utilized when the algorithm is below the threshold for exploitation purposes. We illustrate the power and benefits of landscape modification by investigating its effect on the classical Curie–Weiss model with Glauber dynamics and external magnetic field in the subcritical regime. This leads to a landscape-modified mean-field equation, and with appropriate choice of c the free energy landscape can be transformed from a double-well into a single-well landscape, while the location of the global minimum is preserved on the modified landscape. Consequently, running algorithms on the modified landscape can improve the convergence to the ground state in the Curie–Weiss model. In the setting of simulated annealing, we demonstrate that landscape modification can yield improved or even subexponential mean tunnelling time between global minima in the low-temperature regime by appropriate choice of c , and we give a convergence guarantee using an improved logarithmic cooling schedule with reduced critical height. We also discuss connections between landscape modification and other acceleration techniques, such as Catoni's energy transformation algorithm, preconditioning, importance sampling, and quantum annealing. The technique developed in this paper is not limited to simulated annealing, but is broadly applicable to any difference-based discrete optimization algorithm by a change of landscape. [ABSTRACT FROM AUTHOR]

Accelerating the transformation of the rural energy structure is an indispensable part of energy transformation in developing countries. In this novel study, the transformation effect of China's rural energy structure from 2001 to 2020 was evaluated. Further, this paper also identified the decoupling state between the rural energy structure transition and carbon emissions, and decomposed the spatial–temporal effects of rural carbon decoupling through efficiency measures. According to the survey, the dual substitution index of the rural energy structure in China increased from 0.466 to 1.828, and showed a decreasing trend in spatial distribution from the east to the central and western regions. Economic development and climate characteristics have become important influencing factors for the dual substitution of the rural energy structure. The decoupling relationship between the dual substitution of the rural energy structure and carbon emissions was mainly characterized in the strong decoupling, expansion negative decoupling, and strong negative decoupling states. Regional imbalances have deepened as the efficiency of rural energy carbon decoupling has gradually increased. The annual average efficiency of rural energy carbon decoupling in a dynamic perspective has increased by 10.579%, and the dual substitution of the energy structure has a significant driving effect on rural carbon reduction. [ABSTRACT FROM AUTHOR]

Copyright of Business Administration Quarterly / Kwartalnik Nauk o Przedsiebiorstwie is the property of SGH Warsaw School of Economics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Climate policy-driven transformation processes in the energy sector are accelerating changes to both national and international legal frameworks. However, no successful just energy transition is achievable without significant regulatory reforms. In this context, the article examines the possibility for modifying and introducing regulatory tools to guarantee that the just energy transition is conducted in order to accomplish climate goals and lower anthropogenic greenhouse gas emissions into the atmosphere. The analysis is based on the application of the theory of energy justice and its five principal pillars: recognition, procedural, distributive, restorative, and cosmopolitan justice. For each of these five domains, the paper proposed regulatory tools that can strengthen the energy policies, both pursued and planned, in terms of institutional and decision-making dimensions. The analysis' key conclusion is that there is a need for a fundamental change in how energy policies are planned and conducted, and that its regulatory tools must be modified to meet the requirements of energy justice. As a result, proposed in this paper are universal measures to institutionalise energy justice in different legal regimes that should be viewed as advancements in the effort to make energy transition processes more just. [ABSTRACT FROM AUTHOR]

The aim of this article is to present solutions related to wind energy in EU countries as an alternative to fossil fuels. This article is based on secondary information and statistical data regarding the development of wind power engineering in EU countries for the years 2016–2022. The main purpose of this paper is to analyze of the relations between the development of wind energy in European Union countries and GPD (gross domestic product) per capita and selected factors. The following hypotheses were formulated: H1—There is a statistically significant correlation between GDP per capita and the use of wind energy in European Union countries. H2—There is a relationship between the length of the coastline and the use of wind energy in European Union countries. H3—There is a statistically significant correlation between the attitude to uncertainty of the inhabitants of a given country and the use of wind energy in said country. The presented research results support all these hypotheses. The results of the research regarding H2 are as follows: in the case of northern European countries (Ireland and Finland) and the Iberian Peninsula (Spain and Portugal), the development of wind power engineering in the study period was faster than could be inferred from the length of the coastline in these countries. Regarding hypothesis H1, it was concluded on the basis of the analysis that the involvement of countries in the development of wind power engineering is correlated with their wealth. The novelty of this paper emerges from its innovative approach to analyzing wind power engineering, its incorporation of cultural factors, its quantitative assessment of correlations, and its actionable policy recommendations. These elements collectively contribute to a comprehensive and impactful study that advances our understanding of wind energy adoption in the European Union. [ABSTRACT FROM AUTHOR]

Green finance is profoundly affecting the energy transition, and at the global level, renewable energy has entered a leapfrog development phase. Unlike the research object that existing studies focus on, this paper selects 53 countries and regions that have launched green finance businesses as research sample, and empirically assesses the effect of green finance on the development of renewable energy based on cross-country panel data spanning 2000 to 2021. The results show that renewable energy development is positively impacted by green finance, and the marginal impact of green finance is gradually growing as renewable energy development level improves; the contribution of green finance to renewable energy development holds only in developed countries, emerging economies, countries with high green financial development levels, and countries with strong environmental regulations, but not in relatively backward developing countries, countries with low green financial development levels, and countries with weak environmental regulations; sectors of renewable energy that rely more heavily on external financing are more likely to be promoted by green finance; green finance supports renewable energy development mainly through promoting investment in renewable energy fixed assets and innovation in technology of the sector. This study provides an empirical and theoretical basis for green finance to promote renewable energy development. [ABSTRACT FROM AUTHOR]

When solving open-region electromagnetic scattering problems using the standard finite element method, the infinite region exterior to the scatterer must be truncated with an artificial outer boundary. In the interior or finite part of the domain, finite elements can be used, but a boundary condition must be introduced at this artificial boundary to obtain a unique finite element solution. One class of boundary conditions designed for this purpose is called absorbing boundary conditions (ABCs). Several ABCs have been reported in the literature. These can be broadly classified into two categories: local and non-local. In this paper, we present new closed-form expressions for Nth-order local ABCs, equivalent to the well-known sequences of the Bayliss, Gunzburger, and Turkel boundary operators. To the best of our knowledge, these expressions have not yet been reported in the literature. Two- and three-dimensional problems are considered in this study. We also discuss the problem of incorporating custom ABCs into commercial finite element method programs, which are usually closed-source software packages. Two 2D electromagnetic scattering and radiation problems with known analytical solutions are analyzed. [ABSTRACT FROM AUTHOR]

Hydrogen energy has an advantage over conventional fossil energy because of its clean and low-carbon features, while its stability gives it an advantage over renewable energy sources such as hydropower, photovoltaic (PV) power, and wind power. Using hydrogen as a fuel can achieve zero carbon emissions or even net zero emissions at the end of energy conversion. Moreover, with hydrogen as the carrier, an energy system of multi-energy complementarity will be established by coupling multiple energy systems such as power grids, gas grids and heat networks, which can realize the comprehensive utilization of renewable energy sources in an efficient, stable, and flexible manner. Based on the "dual carbon" goals, this paper targets sectors with high carbon emissions represented by electric power, steel and transportation, analyzes the feasible path of using hydrogen energy to promote deep carbon reduction, and points out the obstacles faced by hydrogen energy development in various sectors. On account of the current development and expected prospects, this paper proposes that the current focus of hydrogen energy industry is to coordinate the development of industrial sectors and regions, build a pattern that can facilitate the industry's systematic and concerted development, address key technical challenges (such as green hydrogen production or hydrogen storage and transportation via pipeline), improve industrial standards, and promote the industry's development in a balanced, coordinated and orderly way. [ABSTRACT FROM AUTHOR]

Energy systems are rapidly transforming towards sustainability, involving significant realignments in social, economic and political systems. New actors such as communities are seeking empowerment to engage in transformations. A range of actors has applied the concept of empowerment in energy transformations to signify different ideas for how communities can engage with energy. As such, its meaning is shaped by ambiguities, uncertainties and contestations. Traditionally, a neoliberal discourse has framed empowerment in energy, resulting in a hollowing of the term and questions around what it means, to whom and in which contexts. This paper contributes to this debate by unpacking empowerment in energy transformations in the context of community energy initiatives. Building on interviews and multicriteria mapping techniques, this paper concludes that all energy stakeholders prefer the strongest options for empowerment. However, empowerment is a co‐produced phenomenon revealing a role for all stakeholders in its cultivation. Embracing diverse understandings of empowerment has implications for how governance can facilitate community empowerment in energy transformations. [ABSTRACT FROM AUTHOR]

Copyright of Energy Policy Journal / Polityka Energetyczna is the property of Mineral & Energy Economy Research Institute of the Polish Academy of Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The paper outlines the methodology employed for desk-based research, which involved gathering and analyzing empirical data on energy and heating consumption in the Polish small consumer sector. Secondary sources, including reports, documents, scientific publications, and public statistics, were utilized to ensure a comprehensive understanding of the subject matter. The research methodology ensured the acquisition and examination of reliable and extensive data regarding energy and heat consumption among small consumers in Poland. The study investigated consumption trends of hard coal, electricity, and natural gas in Polish households from 2006 to 2021. The findings revealed an increasing pattern in electricity and natural gas consumption, alongside a simultaneous decline in the usage of hard coal. Future consumption was estimated using trend models, and factors contributing to changes in energy consumption patterns were examined, with forecasts to 2027. To achieve decarbonization and address climate objectives, the study underscores the need to increase the proportion of renewable energy sources and boost energy efficiency. The significance of reducing household energy consumption through enhanced insulation, smart energy management systems, and low-carbon alternatives is emphasized. Additionally, the study addresses Poland's future energy plans as a proactive step toward decarbonizing the national economy. In summary, the study furnishes valuable insights into energy consumption trends and their determinants in the Polish small consumer sector. [ABSTRACT FROM AUTHOR]

The transformation of the European energy sector is becoming a priority for the European Union. This is indicated, for instance, in the European Union strategy known as the European Green Deal. According to the Green Deal, the area of 'research and innovation' is one which can counteract climate change. Universities can play a significant role in this by adopting a pedagogical approach aimed at mobilizing the spirit of innovation and entrepreneurship in young professionals. In addition to modifying curricula related to mining, energy, and environmental engineering, i.e., activities in recognized, traditional schemes, one prospective tool may be the involvement of students and PhD candidates in European initiatives such as the InnoEnergy PhD School (which is funded by the European Institute of Innovation and Technology). This paper aims to discuss the InnoEnergy PhD School programme as a possible instrument for mitigating the negative effects of energy transformation. The article analyzes the programme using a case study method, including surveys and open interviews. The paper draws attention to and highlights the role of human resources in the field of education and the stimulation of innovation, as well as the need to strengthen the business component in the education of PhD candidates. [ABSTRACT FROM AUTHOR]

Background: Formative assessments are needed to enable monitoring how student knowledge develops throughout a unit. Constructed response items which require learners to formulate their own free‐text responses are well suited for testing their active knowledge. However, assessing such constructed responses in an automated fashion is a complex task and requires the application of natural language processing methodology. In this article, we implement and evaluate multiple machine learning models for coding energy knowledge in free‐text responses of German K‐12 students to items in formative science assessments which were conducted during synchronous online learning sessions. Dataset: The dataset we collected for this purpose consists of German constructed responses from 38 different items dealing with aspects of energy such as manifestation and transformation. The units and items were implemented with the help of project‐based pedagogy and evidence‐centered design, and the responses were coded for seven core ideas concerning the manifestation and transformation of energy. The data was collected from students in seventh, eighth and ninth grade. Methodology: We train various transformer‐ and feature‐based models and compare their ability to recognize the respective ideas in students' writing. Moreover, as domain knowledge and its development can be formally modeled through knowledge networks, we evaluate how well the detection of the ideas within responses translated into accurate co‐occurrence‐based knowledge networks. Finally, in terms of the descriptive accuracy of our models, we inspect what features played a role for which prediction outcome and if the models pick up on undesired shortcuts. In addition to this, we analyze how much the models match human coders in what evidence within responses they consider important for their coding decisions. Results: A model based on a modified GBERT‐large can achieve the overall most promising results, although descriptive accuracy varies much more than predictive accuracy for the different ideas assessed. For reasons of comparability, we also evaluate the same machine learning architecture using the SciEntsBank 3‐Way benchmark with an English RoBERTa‐large model, where it achieves state‐of‐the‐art results in two out of three evaluation categories. Lay Description: What is already known about this topic?: Formative assessments are needed to test and monitor the development of learners' knowledge throughout a unit to provide them with appropriate automated feedback.Constructed response items which require learners to formulate their own free‐text responses are well suited for testing their active knowledge.Assessing constructed responses in an automated fashion is a widely researched topic, but the problem is far from solved and most of the work focuses on predicting holistic scores or grades.To allow for a more fine‐grained and analytic assessment of learners' knowledge, systems which go beyond predicting simple grades are required.To guarantee that models are stable and make their predictions for the correct reasons, methods for explaining the models are required. What this papers adds?: A core topic in physics education is the concept of energy.We implement and evaluate multiple systems based on natural language processing technology for assessing learners' conceptual knowledge about energy physics using transformer language models as well as feature‐based approaches.The systems assess students' knowledge about various forms of energy, indicators for the same and the transformation of energy from form into another.As our systems are based on machine learning methodology, we introduce a novel German short answer dataset for training them to detect the respective knowledge elements within students' free‐text responses.We evaluate the performance of these systems using this dataset as well as the well‐established SciEntsBand‐3‐Way dataset and manage to achieve, to our best knowledge, new state‐of‐the‐art results for the latter.Moreover, we apply methodology for explaining model predictions to assess whether predictions are carried out for the correct reasons. Implications for practice and/or policy: It is indeed possible to assess constructed responses for the demonstrated knowledge about energy physics in an analytic fashion using natural language processing.Transformer language models can outperform more specialized feature‐based approaches for this task in terms of predictive and descriptive accuracy.Co‐occurrences of different concepts within the same responses can lead models to learn undesired shortcuts which make them unstable. [ABSTRACT FROM AUTHOR]

Currently, hydrogen and electric drives used in various means of transport is a leading topic in many respects. This article discusses the most important aspects of the operation of vehicles with electric drives (passenger cars) and hydrogen drives. In both cases, the official reason for using both drives is the possibility of independence from fossil fuel supplies, especially oil. The desire for independence is mainly dictated by political considerations. This article discusses the acquisition of basic raw materials for the construction of lithium-ion batteries in electric cars, as well as methods for obtaining hydrogen as a fuel. The widespread use of electric passenger cars requires the construction of a network of charging stations. This article shows that, taking into account the entire production process of electric cars, including lithium-ion batteries, the argument that they are ecological cannot be used. Additionally, it was indicated that there is no concept for the use of used accumulator batteries. If hydrogen drives are used in trains, there is no need to build the traction network infrastructure and then continuously monitor its technical condition and perform the necessary repairs. Of course, the necessary hydrogen tanks must be built, but there must be similar tanks to store oil for diesel locomotives. This paper also deals with other possibilities of hydrogen application for transformational usage, e.g., the use of combustion engines driven with liquid hydrogen. Unfortunately, an optimistic approach to this issue does not allow for a critical view of the whole matter. In public discussion, there is no room for scientific arguments and emotions to dominate. [ABSTRACT FROM AUTHOR]

Abstract The coordinated development of intelligence and greening is an intrinsic demand for high-quality economic and social development. Intelligentization and greening are the leading directions of sustainable development of the power industry. This paper directs of sustainable development of the power industry. This paper empirically analyzes the effect and mechanism of intelligence on the green environmental friendliness of electric power substations by using a panel fixed-effects model and instrumental variable regression, using substation engineering data from China southern power grid during 2013–2022. It is found that the level of intelligence significantly promotes the green performance of substation projects, and this conclusion still holds after a series of robustness tests. Intelligence can reduce material waste and pollutant emissions by improving the engineering environmental monitoring capability and the refinement of engineering resource control, thus improving the environmental friendliness of the project. The research in this paper helps to promote the integrated development of intelligent and green power engineering, to better achieve economic and green goals.

Energy security has become the focus of common attention of all countries in the world. It is an effective way to promote the transformation of energy consumption structure from fossil energy consumption to renewable energy consumption at present. Based on the current development status of China, this paper mainly studies the spatial evolution process of the traditional energy and the renewable energy industry in Hebei province from the perspective of space and time, and analyzes the influencing factors in this process. The results are as follows: (1) Moran's I of the traditional energy industry increased from 0.254515 in 2005 to 0.289301 in 2021. Moran's I of the renewable energy industry increased from 0.31409 in 2005 to 0.426467 in 2021. This indicates the energy transition in Hebei is progressing. It is worth noting that the wind and solar energy industries are both higher than the national average; (2) the spatial diffusion effect of the energy industry in Hebei province becomes more and more significant with the transformation of regional energy industry, forming a spatial distribution trend of southwest to northeast axial diffusion; (3) from 2005 to 2018, the number of green productivity factors affecting the development of both traditional and renewable energy industries increased from 2 to 6. The transformation process of the energy industry in Hebei province is influenced by different factors in different temporal stages. [ABSTRACT FROM AUTHOR]

Purpose: The purpose of this paper is to propose a conceptual framework for handling end of life (henceforth EoL) scenarios of solar photovoltaic (solar PV) panels, which includes different options available to businesses and end-users, as well as promoting the collaboration between government and all relevant stakeholders. Design/methodology/approach: This paper adopts purposeful sampling, secondary data and content analysis to develop an appropriate conceptual framework that helps to create awareness of the appropriate options for dealing with the EoL cases of solar PV panels. Findings: From the data analysis, it is revealed that reuse, repair and recycling of solar PV panels can ensure value creation, public-private partnership and a solution for education in sustainability, and thus, prolonging the useful life cycle of the products. Research limitations/implications: This paper limits the analysis on developing economies and the use of selected literature based on the recycling of solar PV panels. Originality/value: This paper is an initial attempt to create an awareness by identifying, analyzing and educating the stakeholders to handle appropriately any EoL scenario of solar PV panels. [ABSTRACT FROM AUTHOR]

This paper focuses on assessing the significant impact of emission accounting on the energy transformation efforts of 100 leading publicly listed companies in China from 2015 to 2021. Employing the CUP-FM technique, the results indicate that a 1% increase in carbon emissions correlates with approximately a 0.17% rise in fossil fuel consumption. Additionally, a 1% increase in resources allocated to green tax initiatives is associated with roughly a 0.35% reduction in fossil fuel expenditure. The study also reveals a noteworthy correlation between ICT investments and fossil fuel expenditure. The key recommendations emerging from this research include implementing green training programs for the workforce, establishing a robust green corporate management system, and standardizing the financial reporting of sustainable activities. [ABSTRACT FROM AUTHOR]

Copyright of Energy Policy Journal / Polityka Energetyczna is the property of Mineral & Energy Economy Research Institute of the Polish Academy of Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Hydrogen can be considered an innovative fuel that will revolutionize the energy sector and enable even more complete use of the potential of renewable sources. The aim of the paper is to present the challenges faced by companies and economies that will produce and use hydrogen. Thanks to the use of hydrogen in the energy, transport and construction sectors, it will be possible to achieve climate neutrality by 2050. By 2050, global demand for hydrogen will increase to 614 million metric tons a year, and thanks to the use of hydrogen in energy, transport and construction, it will be possible to achieve climate neutrality. Depending on the method of hydrogen production, the processes used and the final effects, several groups can be distinguished, marked with different colors. It is in this area of obtaining friendly hydrogen that innovative possibilities for its production open up. The costs of hydrogen production are also affected by network fees, national tax systems, availability and prices of carbon capture, utilization, and storage installations, energy consumption rates by electrolyzers and transport methods. It is planned that 1 kg of hydrogen will cost USD 1. The study used the desk research method, which made it possible to analyze a huge amount of descriptive data and numerical data. [ABSTRACT FROM AUTHOR]