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In the backdrop of growing global concern on escalating CO₂ emission leading to climate disorder and controversy between economic growth and environment, this study undertakes a decomposition analysis of the top 20 emitters of the world during 1992–2016 with two objectives: to identify the relative contribution of the major driving factors in CO₂ emission and to comprehend the role and performance of sectoral energy consumption pattern in changing the emission level.

The paper uses variance analysis method to perform two stage decomposition: first, it decomposes emission into the major driving factors, and, secondly, it also decomposes fossil fuel intensity of different sectors into fuel mix and energy intensity effects, which are new in the literature.

The results indicate that aggressive pursuit for economic growth, particularly by developing countries, is the major reason behind unprecedented emission growth, with income effect, fossil fuel intensity effect and population effect having substantial roles. Considerable decline in dependence on fossil fuel, coupled with rising emissions, signifies that emission intensity is still to be harnessed. Sectoral decomposition shows that while fossil fuel intensity has declined in residential sector, it has remarkably shot up in industry, transport and commercial sectors. On the other hand, sectoral energy intensity has declined, particularly due to favourable performances of transport and commercial sectors.

The detailed country-wise sectoral analysis identifies the sectors with favourable contribution in curtailing emission and lends a direction to other countries for policy making.

This study contributes by incorporating multi-country sectoral segregation in decomposition analysis. It focuses not only on energy intensity, but on the effect of energy substitution in each sector as well. It identifies the sectors that have lowered their dependence on fossil fuel to highlight that emission can effectively be dealt with through a prudent choice of fuel mix.

Higher economic growth accompanied by rising energy demand poses severe challenges to the long-term environmental sustainability of E7 economies, including Brazil, China, India, Indonesia, Mexico, Russia and Turkey. Thus, this paper explores the influence of foreign direct investment (FDI) inflows on energy diversification for E7 economies.

The dataset is panel data for emerging seven (E7) economies, covering the period 1992–2017. The empirical investigation relies on econometric techniques: panel cointegration test and panel autoregressive distributed lag model.

The findings reveal that energy diversification and FDI inflows are cointegrated. In the long run, higher FDI inflows encourage energy diversification, but energy efficiency improvements discourage energy diversification. In the short run, the effects of FDI inflows on energy diversification vary across E7 economies, highlighting the role of country-specific factors in determining the short-run influence of FDI inflows on energy diversification.

The findings suggested that FDI policies should encourage the adoption of nonconventional energy resources to stimulate energy diversification in E7 economies. Besides, better coordination between energy diversification and energy efficiency policies is required in the long run for a successful transition towards low-carbon economy goals.

This study is a unique empirical exercise that uncovers a cointegrating relationship between energy diversification and FDI inflows for E7 economies. Moreover, the analysis provides homogenous long-run and heterogeneous (country-specific) short-run coefficient estimates for the effect of FDI inflows on energy diversification.

This study aims to investigate the noise-inducing characteristics during the start-up process of a mixed-flow pump and the impact of different start-up schemes on pump noise.

This study conducted numerical simulations on the mixed-flow pump under different start-up schemes and investigated the flow characteristics and noise distribution under these schemes.

The results reveal that the dipole noise is mainly caused by pressure fluctuations, while the quadrupole noise is mainly generated by the generation, development and breakdown of vortices. Additionally, the noise evolution characteristics during the start-up process of the mixed-flow pump can be divided into the initial stage, stable growth stage, impulse stage and stable operation stage.

The findings of this study can provide a theoretical basis for the selection of start-up schemes for mixed-flow pumps, reducing flow noise and improving the operational stability of mixed-flow pumps.

This paper aims to investigate the effect of monetary policy indicators on Latin America’s renewable energy development. The authors conduct several regressions as well as a Principal Component Analysis (PCA) to unveil relationships among possible driving factors among others the current account balance, interest rates, money flow and energy trade balance for Latin America’s energy mix.

The analysis was a two-part process. First, the authors used multiple regression to identify if monetary policy affects the development of renewable energy usage at all. To investigate the singular effects of each of the nine macro-economic variables and four energy indicators, collected from the World Bank (2017) database, several regressions were run where the authors regressed each economic indicator on each energy variable. Then, the authors conducted a principal component analysis with all 13 variables.

The authors found a significant relationship between the clean energy share and governmental spending boosting GDP as well as a significant relationship between governmental spending and the amount of foreign exchange reserves. Declining net energy imports indicate that countries in Latin America are getting more and more energy autonomous for the price of building up huge amounts of foreign exchange reserves.

Renewable energy indicators are not always available for all Latin American countries. Data tend to be scattered. However, sources such as the International Renewable Energy Agency and the World Bank database can be complementary.

The understanding of the effects and impacts of some of the monetary policy related indicators can provide insights for improving renewable energy financing policies. In turn, such policies can have increased influence on renewable energy sustainability and potentially contribute to improving environmental policies.

The specific impact of the selected variables on renewable energy has not been studied. This study attempts to discern the impact of such variables to understand how they influence the renewable energy mix. The insights can in turn inform and modify existing policies and guidelines as well as advise new policy.

This paper aims to review the role of government initiatives for developing clean fuels in India, decarbonize the transport sector and maximize the use of renewable sources of energy. India’s socio-economic prosperity is dependent on modern energy. The authors examine the role of biofuel in India’s emerging fuel mix.

A 20-year timeframe between 2000 and 2021 was set to learn about the subject and find the existing gaps. Of the 40 research papers, the authors found using keywords and delimiting criteria in the database, the authors have shortlisted 21 papers, which provided the theoretical framework for the study. Additionally, the authors used the government database to develop future projections using compound annual growth rate and trend analysis.

The study findings suggest that India should strictly implement the Biofuel Policy to promote indigenous production of biofuel to enhance affordability and accessibility. With blending options available with biofuels and biogas, the country can replace the right proportion of fossil fuel use by 2050. It will not only decrease India’s import dependence but also will create new job opportunities, specifically in tribal and remote locations and promote green energy mix. With emerging options like electric vehicle and hydrogen, the transport sector could be decarbonized to a greater extent.

Indigenous cleaner fuel adoption and transport sector will generate additional employment and cut down fossil fuel import. Financial savings through reduced fossil fuel import will be directed toward social development.

The paper carries out critical analysis for the active use of modern green fuels in the present and coming days. Such unique analysis must help India to balance its energy basket.

Reverse osmosis (RO) has become an important method of desalination to meet the ever-growing water needs around the world. Its integration with renewable energy source (RES) reduces the environmental impact of gas emissions and cost of conventional fossil energy sources. The optimal sizing of energy sources to power RO desalination system is intended mainly to minimize the annualized cost of the system and by extension minimize freshwater cost while maximizing production.

In this study, a mathematical optimization approach is used to determine the optimal energy mix, which includes grid power, diesel generator and a photovoltaic (PV) module to supply an RO desalination unit. Three cases of optimal sizing approach were compared. Case 1 is a system with only grid power and diesel generator as energy sources; Case 2 has PV incorporated in the energy supply mix while Case 3 has the three energy sources and a Time of Use (TOU) demand response program on the demand side.

The results of implementing the optimization models show that Case 3 turnout the highest freshwater production (1,521 m³/day) at a unit cost of 1.36$/m³ when compared to Case 1 with daily freshwater production of 1,250 m³/day at a unit cost of 1.68$/m³ and Case 2 having a daily freshwater production of 1,501 m³/day at a unit cost of 1.33$/m³.

The integration of RES to power desalination system with application of TOU demand response is the significance of this study.

In spite of the drive toward environmental sustainability and the attainment of sustainable development goals (SDGs), coal, oil and natural gas energy utilization has remained the Turkey's largest energy mix. In view of this concern, this study examined the role of coal and oil energy utilization in environmental sustainability drive of Turkey from the framework of sustainable development vis-à-vis income expansion over an extended period of 1965–2017.

In this regard, the authors employ carbon emission as an environmental and dependent variable while the Gross Domestic Product per capita (GDPC), coal and oil energy consumption are the explanatory variables employed in the study.

The study found that both energy mixes (coal and oil) have a detrimental impact on the environment in both the short and long run, but oil consumption exerts a less severe impact as compared to coal energy. In addition, sustainable development via income growth is not feasible because the income–environmental degradation relationship follows a U-shaped pattern (invalidating the Environmental Kuznets curve, EKC hypothesis) especially when coal and oil remained the major source of lubrication to the economy. At least the EKC hypothesis is unattainable in Turkey as long as the country's major energy mix or primary energy (coal and oil) is in use, thus the application of other socioeconomic, macroeconomic policies might be essential.

Considering the lingering energy challenge associated with Turkey, this novel insight further presented useful policy perspectives to the government and stakeholders in the country's energy sector.

This evidence (the U-shaped relationship) is further ascertained when the aggregate primary energy is employed. Thus, this study provides a novel insight that attaining a sustainable economic growth in Turkey remained a herculean task as long as a more aggressive energy transition approach is not encouraged.

The connection between urbanization and energy consumption in the context of cross-country and cross-sector analyses is poorly understood, especially in the Association of South East Asian (ASEAN). This paper aims to present the first extensive multi-level analysis of the relationship between urbanization and energy consumption in ASEAN countries from 1995 to 2013.

The multi-level (across country and sector) index decomposition method is used to analyze urbanization, energy mix, energy intensity and activity effects on energy demand. Urbanization is measured by two representative factors, name the urban population and the number of non-agriculture workers.

Despite the decreasing rate of urbanization, its effect on energy consumption has played the most important role since 2000. Since then, the effect has continued to increase at the national and sectoral levels across the whole region. The strongest urbanization impacts are encountered in the residential sector, followed by transportation and industrial sectors with much weaker effects in the commercial sector. The way in which urbanization impacts energy consumption depends strongly on the income level of the country studied.

The results provide quantitative relationships between urbanization and energy demand. For example, if the urban population and the non-agriculture workers decreased by 0.1 per cent per year, this would reduce energy demand by 1.4 per cent and 2.6 per cent per year respectively.

This contribution provides detailed quantitative insights into the relationships between urbanization and energy demand at sectoral, national and international levels, which are invaluable for policymakers in the region.

From the 1990s to the present, decision-makers around the world have sought to identify the most appropriate legal framework to support the energy transition. This research aims to analyze the institutional dynamics of renewable energy promotion, focusing on regulatory aspects at the European and national level and emphasizing the case of Romania through several comparative approaches. In the context of the conflict in Ukraine, we focused on the issue of coal, which was reconsidered given the dependence of some European countries on this resource. The main research methods used in this study are comparative analysis and analysis of chronological information in a historical context, with correlations being made. The study was structured in three stages, the first from the 1990s until the European Energy Union formation, the second during the COVID-19 pandemic, and the third from the emergence of the conflict in Ukraine, which determined the recalibration of previously adopted measures. Starting from the hypotheses formulated and considering the regulatory scenario conducive to the transfer of public funds to achieve climate neutrality, the results of the study show the fact that, at this stage of the research, the states of the European continent are determined to fight for zero carbon by 2050. One result we found interesting is that almost a year after the outbreak of the conflict in Ukraine, less than a quarter of European states have moved past their assumed deadline for phasing out coal in the national mix.

The purpose of this paper is to assess the potential of renewable energy as an essential future energy source in the Gulf Cooperation Council (GCC) region. This paper summarizes the main projects and measures established to start the transition toward renewable energy. The opportunities and challenges for developing renewable energy projects have been discussed to reach a better understanding of the future of renewable energy in the region.

The paper provides a literature-based study on the status of the renewable energy sector in the GCC, including potentials, projects, targets and strategies. The opportunities and challenges of the development of renewable energy sources in the GCC region have been discussed based on the literature.

The paper shows that the GCC countries have begun to adopt a more proactive approach toward renewable energy, while the reorientation of strategies and plans for renewable energy is evolving in these countries. All of the GCC countries focus on solar and wind energies and plan to invest in waste-to-energy (WtE), while only Saudi Arabia is interested in going for geothermal.

The paper contributes to the provision of an extensive literature review on the development of renewable energy in the GCC countries. It provides an updated and comprehensive overview of the region’s renewable energy potential and highlights the main renewable energy strategies and targets. This paper targets regional decision-makers as well as multilateral stakeholders to formulate a set of recommendations to promote renewable energy deployment and improve industrial capabilities.