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There is serious debate among researchers regarding the sustainability implications of economic prosperity and energy dependence. Energy consumption has a critical linkage with economic growth, but it also degrades environmental quality. Therefore, it is important to investigate the relationship between economic growth, the energy mix, and environmental sustainability. However, empirical literature utilizes narrow variables to capture environmental sustainability. Because of this, this research introduces a new environmental sustainability variable using entropy weighting and combining deforestation, household carbon emissions, and life expectancy. This study examines the relationship between environmental sustainability, economic growth, and other selected variables using data from 2002 to 2019 for the G20 and its high-, upper-, and low-middle-income member countries. Since shocks in one G20 country can affect another, this study uses the Augmented Mean Group (AMG) technique for empirical analysis. The results of this study indicate that Gross Domestic Product (EG) and its square term did not support the Environmental Kuznets Curve (EKC) theory. The energy mix has a positive impact on the environmental sustainability gap across all the samples except for the upper-middle-income group. Foreign direct investment positively affects this gap, while population growth has no significant impact. These findings demonstrate that policymakers should support environmentally friendly and clean energy sources to foster long-term economic growth and sustainability.

The war in Afghanistan left significantly negative consequences in all spheres of its society, leading the country to the highest levels of poverty, hunger, and environmental damage. This study explores the long-run impact of civil wars on environmental degradation in Afghanistan using the conceptual framework of the Environmental Kuznets Curve and models augmented with pollutants, civil wars, comprehensive financial development index, and macroeconomic predictors on a set of data from the first quarter of 2002 to the first quarter of 2020. However, while the results confirm long-run relationships amid indicators by the autoregressive distributed lags bound test, the results of the vector error-correcting model to Granger causality reveal bidirectional causality links between CO2 emissions, per capita real GDP, civil wars, the financial development index, energy consumption, trade openness, and the inflation rate in the long-run, while the findings extend to confirm multidimensionality and interdependencies among predictors in the short-run. Moreover, the results indicate dual findings. First, it confirms that civil wars, the financial development index, per capita real gross domestic product, population growth, and the inflation rate significantly increase CO2 emissions, while the squared per capita real gross domestic product, energy consumption, and trade openness reduce CO2 emissions both in the short and long runs. Second, the results confirm an inverted U-shaped relationship, supporting the validity of the Environmental Kuznets Curve hypothesis in Afghanistan. Based on the findings, appropriate policy measures are recommended.

The present study presents a retrospect into environmental Kuznets curve hypothesis (EKC). The EKC debate is dated over four decade long and worthy of empirical scrutiny. To this end, the present study leverages on over 200 previous studies curated from SCOPUS and Web of science (WOS) core collection database respectively. The present study also presented both literature schematic on the evolution, trends, gaps, and future directions on the EKC debate. This paper endeavors to enhance our comprehension of the inherent paradoxes present in sustainability discourses by delving into the fundamental assumptions underlying the Environmental Kuznets curve (EKC). By conducting a bibliometric analysis, we aim to shed light on the factors contributing to the prominence of thematic keywords within sustainability discourses. This study seeks to provide valuable insights into these dynamics and implications on sustainability debates. Key empirical findings outlines predominant and influential studies and journal outlets on the theme under consideration. The present study bibliometric analysis displays that Ozturk i. with 13 published papers 3153 citations and a link strength of 2, Dogan e. Had 7 papers with 2190 citations with no link strength, Shahbaz. B 7 papers 1347 citations and 1 link strength, Saboori b.7 papers 677 citations 1 strength link and Liu y. 6 papers 582 citations with no link strength. From a policy dimension, the present bibliometric study presents valuable depth on the evolution and development of the EKC phenomenon by identifying's the extant literature leaders, action-step for future studies on environmental sustainability without compromise on economic growth as the EKC theme express the tradeoff between economic growth and environmental degradation. Further insights are rendered in the concluding section.

The European Union (EU) is extremely concerned about the environmental harm caused by rising CO2 emissions and other factors. The EU has to uncover factors that decrease pollution before it's too late to achieve long-term sustainable growth. The paper applies the environmental Kuznets curve (EKC) hypothesis to examine the dynamic connection between GDP, energy use, energy intensity, research and development (R&D), and CO2 emissions. Data from 34 countries in the EU, spanning from 1990 to 2021, were applied. EU countries are very interdependent on one another due to tourism, trade, education, religion, and culture. Therefore, tests for cross-sectional dependency (CSD) and slope heterogeneity (SH) are used in this research. After establishing the presence of CSD and SH issues, the study employed second-generation unit root and cointegration tests. In response to these concerns, the study implemented a novel cross-section autoregressive distributed-lag model (CS-ARDL) method. There exists a U-shaped quadratic link between environmental pollution and wealth. That rules out the existence of the EKC hypothesis in the EU. This means that when income grows, pollution will drop up to a certain point, and then it will begin to climb again. Long-term pollution is reduced by the use of renewable energy and R&D. On the other hand, energy intensity increases CO2 emissions. The article also applied the CCEMG, AMG, and MG estimators to test the robustness. The CS-ARDL methodology demonstrates that increasing national income, nuclear energy, and investment in R&D alone will not be sufficient to fulfill environmental needs and that the use of alternative renewable energy sources is the greatest approach to mitigate environmental deterioration in the EU. The AMG, MG, and CCEMG estimators all agree that switching to renewable energy is the most effective strategy to lower emissions. This research offers crucial guidelines for advancing environmental policy and realizing sustainable development. Discussion, policy recommendations, and future research based on the findings are presented.

The main purpose of this study is to analyze the existence of an environmental Kuznets curve (EKC) considering the midst of energy consumption, population and economic development. The main objective is to investigate the impact of energy consumption, population and economic development on CO2 emissions. This study has taken data from 1971 to 2020 to see the existence of an EKC in the country of Bangladesh. Besides population growth, energy consumption and economic development are also taken into consideration. An autoregressive distributed lag (ARDL) model was used to scrutinize cointegration based on selected variables and their respective I (0) and I (1) values. This study has confirmed the long-term existence of the EKC in the environment. The environmental Kuznets curve was also tested using economic performance coefficients on emissions. In the long run, EKC explains why per capita carbon output decreases with population expansion but turns down after a certain threshold level is achieved because of this inverted U-shaped pattern. For decades, increased energy consumption has been linked to worsening environmental conditions, according to this study. According to the findings, there are a wide variety of approaches to advancing Bangladesh's economy and improving its environmental quality. In the long run, the population has no positive impact on CO2 secretion. The use of fossil fuels such as gas and oil can have a detrimental environmental impact. As a result, if we want to conserve the environment, we need to use renewable energy sources like solar and biodiesel instead of traditional, nonrenewable fuels.

The impact of corruption on carbon emissions is one of the main objectives of empirical studies on environmental economics. Recently, a theoretical discussion was conducted on the significant impact of reducing the level of corruption on environmental quality in developing rather than in developed countries. In this study, an empirical investigation of this claim was conducted using panel data which included 61 countries, between 2003 and 2016. The effects of corruption on carbon emission were considered using a panel threshold model. The threshold variable included human development index (HDI) which divided countries into developing and developed ones endogenously. According to the results, the value of threshold (γ = 0.753) was consistent with the categorization of UNDP countries by HDI. In developing countries, for each unit of increase in the corruption index –which means a decrease in corruption levels– we observe a 0.08 unit decrease in carbon emission while carbon emission is no longer affected by the corruption levels in developed countries and decrease in corruption does not have a significant effect on carbon emission levels.

There is serious debate among researchers regarding the sustainability implications of economic prosperity and energy dependence. Energy consumption has a critical linkage with economic growth, but it also degrades environmental quality. Therefore, it is important to investigate the relationship between economic growth, the energy mix, and environmental sustainability. However, empirical literature utilizes narrow variables to capture environmental sustainability. Because of this, this research introduces a new environmental sustainability variable using entropy weighting and combining deforestation, household carbon emissions, and life expectancy. This study examines the relationship between environmental sustainability, economic growth, and other selected variables using data from 2002 to 2019 for the G20 and its high-, upper-, and low-middle-income member countries. Since shocks in one G20 country can affect another, this study uses the Augmented Mean Group (AMG) technique for empirical analysis. The results of this study indicate that Gross Domestic Product (EG) and its square term did not support the Environmental Kuznets Curve (EKC) theory. The energy mix has a positive impact on the environmental sustainability gap across all the samples except for the upper-middle-income group. Foreign direct investment positively affects this gap, while population growth has no significant impact. These findings demonstrate that policymakers should support environmentally friendly and clean energy sources to foster long-term economic growth and sustainability., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2024 The Authors.)

The war in Afghanistan left significantly negative consequences in all spheres of its society, leading the country to the highest levels of poverty, hunger, and environmental damage. This study explores the long-run impact of civil wars on environmental degradation in Afghanistan using the conceptual framework of the Environmental Kuznets Curve and models augmented with pollutants, civil wars, comprehensive financial development index, and macroeconomic predictors on a set of data from the first quarter of 2002 to the first quarter of 2020. However, while the results confirm long-run relationships amid indicators by the autoregressive distributed lags bound test, the results of the vector error-correcting model to Granger causality reveal bidirectional causality links between CO 2 emissions, per capita real GDP, civil wars, the financial development index, energy consumption, trade openness, and the inflation rate in the long-run, while the findings extend to confirm multidimensionality and interdependencies among predictors in the short-run. Moreover, the results indicate dual findings. First, it confirms that civil wars, the financial development index, per capita real gross domestic product, population growth, and the inflation rate significantly increase CO 2 emissions, while the squared per capita real gross domestic product, energy consumption, and trade openness reduce CO 2 emissions both in the short and long runs. Second, the results confirm an inverted U-shaped relationship, supporting the validity of the Environmental Kuznets Curve hypothesis in Afghanistan. Based on the findings, appropriate policy measures are recommended., Competing Interests: The authors do not have any conflict of interest for declare., (© 2024 Published by Elsevier Ltd.)

The present study presents a retrospect into environmental Kuznets curve hypothesis (EKC). The EKC debate is dated over four decade long and worthy of empirical scrutiny. To this end, the present study leverages on over 200 previous studies curated from SCOPUS and Web of science (WOS) core collection database respectively. The present study also presented both literature schematic on the evolution, trends, gaps, and future directions on the EKC debate. This paper endeavors to enhance our comprehension of the inherent paradoxes present in sustainability discourses by delving into the fundamental assumptions underlying the Environmental Kuznets curve (EKC). By conducting a bibliometric analysis, we aim to shed light on the factors contributing to the prominence of thematic keywords within sustainability discourses. This study seeks to provide valuable insights into these dynamics and implications on sustainability debates. Key empirical findings outlines predominant and influential studies and journal outlets on the theme under consideration. The present study bibliometric analysis displays that Ozturk i. with 13 published papers 3153 citations and a link strength of 2, Dogan e. Had 7 papers with 2190 citations with no link strength, Shahbaz. B 7 papers 1347 citations and 1 link strength, Saboori b.7 papers 677 citations 1 strength link and Liu y. 6 papers 582 citations with no link strength. From a policy dimension, the present bibliometric study presents valuable depth on the evolution and development of the EKC phenomenon by identifying's the extant literature leaders, action-step for future studies on environmental sustainability without compromise on economic growth as the EKC theme express the tradeoff between economic growth and environmental degradation. Further insights are rendered in the concluding section., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2023 The Authors.)

The European Union (EU) is extremely concerned about the environmental harm caused by rising CO 2 emissions and other factors. The EU has to uncover factors that decrease pollution before it's too late to achieve long-term sustainable growth. The paper applies the environmental Kuznets curve (EKC) hypothesis to examine the dynamic connection between GDP, energy use, energy intensity, research and development (R&D), and CO 2 emissions. Data from 34 countries in the EU, spanning from 1990 to 2021, were applied. EU countries are very interdependent on one another due to tourism, trade, education, religion, and culture. Therefore, tests for cross-sectional dependency (CSD) and slope heterogeneity (SH) are used in this research. After establishing the presence of CSD and SH issues, the study employed second-generation unit root and cointegration tests. In response to these concerns, the study implemented a novel cross-section autoregressive distributed-lag model (CS-ARDL) method. There exists a U-shaped quadratic link between environmental pollution and wealth. That rules out the existence of the EKC hypothesis in the EU. This means that when income grows, pollution will drop up to a certain point, and then it will begin to climb again. Long-term pollution is reduced by the use of renewable energy and R&D. On the other hand, energy intensity increases CO 2 emissions. The article also applied the CCEMG, AMG, and MG estimators to test the robustness. The CS-ARDL methodology demonstrates that increasing national income, nuclear energy, and investment in R&D alone will not be sufficient to fulfill environmental needs and that the use of alternative renewable energy sources is the greatest approach to mitigate environmental deterioration in the EU. The AMG, MG, and CCEMG estimators all agree that switching to renewable energy is the most effective strategy to lower emissions. This research offers crucial guidelines for advancing environmental policy and realizing sustainable development. Discussion, policy recommendations, and future research based on the findings are presented., Competing Interests: The authors declare no competing interests., (© 2022 The Author(s).)

The main purpose of this study is to analyze the existence of an environmental Kuznets curve (EKC) considering the midst of energy consumption, population and economic development. The main objective is to investigate the impact of energy consumption, population and economic development on CO 2 emissions. This study has taken data from 1971 to 2020 to see the existence of an EKC in the country of Bangladesh. Besides population growth, energy consumption and economic development are also taken into consideration. An autoregressive distributed lag (ARDL) model was used to scrutinize cointegration based on selected variables and their respective I (0) and I (1) values. This study has confirmed the long-term existence of the EKC in the environment. The environmental Kuznets curve was also tested using economic performance coefficients on emissions. In the long run, EKC explains why per capita carbon output decreases with population expansion but turns down after a certain threshold level is achieved because of this inverted U-shaped pattern. For decades, increased energy consumption has been linked to worsening environmental conditions, according to this study. According to the findings, there are a wide variety of approaches to advancing Bangladesh's economy and improving its environmental quality. In the long run, the population has no positive impact on CO 2 secretion. The use of fossil fuels such as gas and oil can have a detrimental environmental impact. As a result, if we want to conserve the environment, we need to use renewable energy sources like solar and biodiesel instead of traditional, nonrenewable fuels., Competing Interests: The authors declare no conflict of interest., (© 2022 The Author(s).)

The impact of corruption on carbon emissions is one of the main objectives of empirical studies on environmental economics. Recently, a theoretical discussion was conducted on the significant impact of reducing the level of corruption on environmental quality in developing rather than in developed countries. In this study, an empirical investigation of this claim was conducted using panel data which included 61 countries, between 2003 and 2016. The effects of corruption on carbon emission were considered using a panel threshold model. The threshold variable included human development index (HDI) which divided countries into developing and developed ones endogenously. According to the results, the value of threshold (γ = 0.753) was consistent with the categorization of UNDP countries by HDI. In developing countries, for each unit of increase in the corruption index -which means a decrease in corruption levels- we observe a 0.08 unit decrease in carbon emission while carbon emission is no longer affected by the corruption levels in developed countries and decrease in corruption does not have a significant effect on carbon emission levels., (© 2019 The Author(s).)