Abstract
In the energy-environment literature, a handful of the advanced economies, mostly the European Union countries, have met some of the national environmental sustainability targets. Consequently, most of these countries are renewing their policies for 2040, while the African bloc largely seems to have a longer path to emerge from the woods. Giving this insight, we are compelled to draw inferences from the role of major energy sources (conventional and renewable) in the sub-Saharan Africa’s drive for environmental sustainability target. To achieve this objective, we examine the validity of an N-shaped hypothesis for sub-Saharan region which has received less documentation in the extant literature. Thus, this study employed the pooled mean group autoregressive distributed lag (PMG-ARDL) and Dumitrescu and Hurlin panel causality approaches as estimation techniques. Our empirical results show that conventional and renewable energy aspects respectively worsen and improve environmental quality in both short and long run. Importantly, the study establishes the validity of the N-shaped hypothesis in the two periods (short and long run) as reported by the study regression with 17.830% for GDP growth, −2.241 % for quadratic form of GDP, and 0.094% for cubic form of GDP growth, respectively, in the long run. Moreso, renewable energy shows a magnitude of −1.306% and −0.157% for short- and long-run period, respectively, on carbon dioxide emission. The implication is that environmental quality in the sub-Saharan region is potentially characterized in cycles of worse (decreased quality), improvement (better quality), and again worse (deceased quality) resulting from the significant change in the region’s economic prosperity. In addition to the ARDL approach, the causality analysis further reiterates that there is significant causality from the energy forms and economic expansion to carbon emission at least in one direction. While examining the validity of N-shaped hypothesis for the first time for Africa, the study offers policy perspective to the governments and environmental stakeholders in the panel countries, especially to re-engineer the region’s economic dynamics if the region must meet the anticipated Sustainable Development Goals 2030.
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References
Acaravci A, Ozturk I (2010) On the relationship between energy consumption, CO2 emissions and economic growth in Europe. Energy 35(12):5412–5420
Adaptation of Forests and People to Climate Change (2009). Available at 17675-022721682d6ef9e51076d5dc46577a9c9.pdf (fao.org) (access date dec 2020)
Adedoyin FF, Alola AA, Bekun FV (2020a) An assessment of environmental sustainability corridor: the role of economic expansion and research and development in EU countries. Sci Total Environ 713:136726
Adedoyin FF, Alola AA, Bekun FV (2020b) The nexus of environmental sustainability and agro-economic performance of sub-Saharan African countries. Heliyon 6(9):e04878
Aljadani A, Toumi H, Toumi S, Hsini M, Jallali B (2021) Investigation of the N-shaped environmental Kuznets curve for COVID-19 mitigation in the KSA. Environ Sci Pollut Res 10:1–20
Al-Mulali U, Tang FC (2013) Investigating the validity of pollution haven hypothesis in the gulf cooperation council (GCC) countries. Energy Policy 60:813–819. https://doi.org/10.1016/j.enpol.2013.05.055
Alola AA, Kirikkaleli D (2019) The nexus of environmental quality with renewable consumption, immigration, and healthcare in the US: wavelet and gradual-shift causality approaches. Environ Sci Pollut Res 26(34):35208–35217
Álvarez-Herránz A, Balsalobre D, Cantos JM, Shahbaz M (2017) Energy innovations-GHG emissions nexus: fresh empirical evidence from OECD countries Energy Policy. Energy Policy 101:90–100
Apergis N, Payne JE (2009) CO2 emissions, energy usage, and output in Central America. Energy Policy 37(8):3282–3286
Apergis N, Payne JE (2010a) Renewable energy consumption and growth in Eurasia. Energy Econ 32(6):1392–1397
Apergis N, Payne JE (2010b) The emissions, energy consumption, and growth nexus: evidence from the commonwealth of independent states. Energy Policy 38(1):650–655
Apergis N, Payne JE (2012) Renewable and non-renewable energy consumption-growth nexus: evidence from a panel error correction model. Energy Econ 34(3):733–738
Apergis N, Payne JE, Menyah K, Wolde-Rufael Y (2010) On the causal dynamics between emissions, nuclear energy, renewable energy, and economic growth. Ecol Econ 69(11):2255–2260
Asiedu BA, Gyamfi BA, Oteng E (2021a) How do trade and economic growth impact environmental degradation? New evidence and policy implications from the ARDL approach. Environ Sci Pollut Res 4:1–9
Asiedu BA, Hassan AA, Bein MA (2021b) Renewable energy, non-renewable energy, and economic growth: evidence from 26 European countries. Environ Sci Pollut Res 28(9):11119–11128
Balsalobre D, Alvarez A (2016) An approach to the effect of energy innovation on environmental Kuznets curve: an introduction to inflection point. Bull Energy Econ 4(3):224–233
Bekun FV, Gyamfi BA (2020) Rethinking the nexus between pollutant emission, financial development, renewable energy consumption and economic growth in G7 countries. In: Social, Human and Administrative Sciences-II, p 73
Bekun FV, Alola AA, Sarkodie SA (2019) Toward a sustainable environment: Nexus between CO2 emissions, resource rent, renewable and nonrenewable energy in 16-EU countries. Sci Total Environ 657:1023–1029
Bekun FV, Alola AA, Gyamfi BA, Yaw SS (2021) The relevance of EKC hypothesis in energy intensity real-output trade-off for sustainable environment in EU-27. Environ Sci Pollut Res:1–12
Ben Jebli, M., Ben Youssef, S., & Ozturk, I. (2013). The environmental Kuznets curve: the role of renewable and non-Renewable energy consumption and trade openness.
Bhat JA (2018) Renewable and non-renewable energy consumption—impact on economic growth and CO 2 emissions in five emerging market economies. Environ Sci Pollut Res 25(35):35515–35530
Bidi MA, Azadi M, Rassouli M (2020) A new green inhibitor for lowering the corrosion rate of carbon steel in 1 M HCl solution: Hyalomma tick extract. Mater Today Commu 24:100996
Bilgili F, Koçak E, Bulut Ü (2016) The dynamic impact of renewable energy consumption on CO2 emissions: a revisited environmental Kuznets curve approach. Renew Sust Energ Rev 54:838–845
Castiglione C, Infante D, Smirnova J (2012) Rule of law and the environmental Kuznets curve: evidence for carbon emissions. Int J Sustain Econ 4(3):254–269
Çoban O, Onifade ST, Yussif AB (2020) Reconsidering trade and investment-led growth hypothesis: new evidence from Nigerian economy. J Int Stud 13(3):98–110. https://doi.org/10.14254/2071-8330.2020/13-3/7
Destek MA, Sarkodie SA (2019) Investigation of environmental Kuznets curve for ecological footprint: the role of energy and financial development. Sci Total Environ 650:2483–2489
Destek MA, Sinha A (2020) Renewable, non-renewable energy consumption, economic growth, trade openness and ecological footprint: evidence from organisation for economic co-operation and development countries. J Clean Prod 242:118537
Dinda S (2004) Environmental Kuznets curve hypothesis: a survey. Ecol Econ 49(4):431–455
Dinda S, Coondoo D, Pal M (2000) Air quality and economic growth: an empirical study. Ecol Econ 34(3):409–423
Dogan E, Seker F, Bulbul S (2017) Investigating the impacts of energy consumption, real GDP, tourism and trade on CO2 emissions by accounting for cross-sectional dependence: a panel study of OECD countries. Curr Issue Tour 20(16):1701–1719
Dumitrescu EI, Hurlin C (2012) Testing for Granger non-causality in heterogeneous panels. Econ Model 29:1450–1460
Gangadharan L, Valenzuela MR (2001) Interrelationships between income, health and the environment: extending the environmental Kuznets curve hypothesis. Ecol Econ 36(3):513–531
Grossman, G. M., & Krueger, A. B. (1991). Environmental impacts of a North American free trade agreement (No. w3914). National Bureau of economic research.
Gyamfi BA, Bein MA, Bekun FV (2020a) Investigating the nexus between hydroelectricity energy, renewable energy, non-renewable energy consumption on output: evidence from E7 countries. Environ Sci Pollut Res Int 27:25327–25339
Gyamfi BA, Bein MA, Ozturk I, Bekun FV (2020b) The moderating role of employment in an environmental Kuznets curve framework revisited in G7 countries. Indo J Sustain Account Manag 4(2)
Gyamfi, B. A., Adedoyin, F. F., Bein, M. A., & Bekun, F. V. (2021a). Environmental implications of N-shaped environmental Kuznets curve for E7 countries. Environmental Science and Pollution Research, 1-11.
Gyamfi BA, Ozturk I, Bein MA, Bekun FV (2021b) An investigation into the anthropogenic effect of biomass energy utilization and economic sustainability on environmental degradation in E7 economies. Biofuels Bioprod Biorefin 14:840–851
Gyamfi BA, Sarpong SY, Bein MA (2021c) The contribution of the anthropogenic impact of biomass utilization on ecological degradation: revisiting the G7 economies. Environ Sci Pollut Res 28(9):11016–11029
Halliru AM, Loganathan N, Golam Hassan AA (2020) Does FDI and economic growth harm environment? Evidence from selected West African countries. Transnatl Corpor Rev:1–15
Hanif I, Raza SMF, Gago-de-Santos P, Abbas Q (2019) Fossils fuels, foreign direct investment, and economic growth have triggered CO2 emissions in emerging Asian economies: some empirical evidence. Energy 171:493–501. https://doi.org/10.1016/j.energy.2019.01.011
Hettige H, Mani M, Wheeler D (2000) Industrial pollution in economic development: the environmental Kuznets curve revisited. J Dev Econ 62:445–447
Ike GN, Usman O, Sarkodie SA (2020) Testing the role of oil production in the environmental Kuznets curve of oil producing countries: new insights from Method of Moments Quantile Regression. Sci Total Environ 711:135208
Im KS, Pesaran MH, Shin Y (2003) Testing for unit roots in heterogeneous panels. J Econ 115(1):53–74
Inglesi-Lotz R, Dogan E (2018) The role of renewable versus non-renewable energy to the level of CO2 emissions a panel analysis of sub-Saharan Africa’s Βig 10 electricity generators. Renew Energy 123:36–43
Ito K (2017) CO2 emissions, renewable and non-renewable energy consumption, and economic growth: evidence from panel data for develo** countries. Int Econ 151:1–6
Jia X, Klemeš JJ, Varbanov PS, Wan Alwi SR (2019) Analyzing the energy consumption, GHG emission, and cost of seawater desalination in China. Energies 12(3):463
Kao C (1999) Spurious regression and residual-based tests for cointegration in panel data. J Econ 90(1):1–44
Khoshnevis Yazdi S, Shakouri B (2017) Renewable energy, nonrenewable energy consumption, and economic growth. Energy Sourc B: Econ Plan Polic 12(12):1038–1045
Lee CC, Chiu YB, Sun CH (2010) The environmental Kuznets curve hypothesis for water pollution: do regions matter? Energy Policy 38(1):12–23
Nathaniel SP (2021) Environmental degradation in ASEAN: assessing the criticality of natural resources abundance, economic growth and human capital. Environ Sci Pollut Res 28:1–13
Nathaniel SP, Adeleye N (2021) Environmental preservation amidst carbon emissions, energy consumption, and urbanization in selected African countries: implication for sustainability. J Clean Prod 285:125409
Nguyen KH, Kakinaka M (2019) Renewable energy consumption, carbon emissions, and development stages: some evidence from panel cointegration analysis. Renew Energy 132:1049–1057
Onifade ST, Alola AA, Erdoğan S, Acet H (2021) Environmental aspect of energy transition and urbanization in the OPEC member states. Environ Sci Pollut Res 28:17158–17169. https://doi.org/10.1007/s11356-020-12181-1
Ozturk I (2010) A literature survey on energy–growth nexus. Energy Policy 38(1):340–349
Pesaran MH, Shin Y, Smith RP (1999) Pooled mean group estimation of dynamic heterogeneous panels. J Am Stat Assoc 94(446):621–634
Pesaran MH, Im KS, Shin Y (2003) Testing for unit roots in heterogeneous panels. J Econ 115:53–74
Sadorsky P (2009) Renewable energy consumption and income in emerging economies. Energy Policy 37(10):4021–4028
Saint Akadiri S, Bekun FV, Sarkodie SA (2019) Contemporaneous interaction between energy consumption, economic growth and environmental sustainability in South Africa: what drives what? Sci Total Environ 686:468–475
Saint Akadırı S, Alola AA, Usman O (2021) Energy mix outlook and the EKC hypothesis in BRICS countries: a perspective of economic freedom vs. economic growth. Environ Sci Pollut Res 28(7):8922–8926
Sarkodie SA, Ozturk I (2020) Investigating the environmental Kuznets curve hypothesis in Kenya: a multivariate analysis. Renew Sust Energ Rev 117:109481
Sarkodie SA, Strezov V (2019) Effect of foreign direct investments, economic development and energy consumption on greenhouse gas emissions in develo** countries. Sci Total Environ 646:862–871
Schneider, N. (2006). Renewable energy, energy efficiency, and CO2 emissions in develo** countries: evidence from the Pesaran (2006) common correlated effects model. Energy Efficiency, and CO2 emissions in Develo** Countries: Evidence from the Pesaran.
Sebri M, Ben-Salha O (2014) On the causal dynamics between economic growth, renewable energy consumption, CO2 emissions and trade openness: fresh evidence from BRICS countries. Renew Sust Energ Rev 39:14–23
Shahbaz M, Tiwari AK, ad Nasir M. (2013) The effects of financial development, economic growth, coal consumption and trade openness on CO2 emissions in South Africa. Energy Policy 61:1452–1459. https://doi.org/10.1016/j.enpol.2013.07.006
Shahbaz M, Balsalobre-Lorente D, Sinha A (2019) Foreign direct Investment–CO2 emissions nexus in Middle East and North African countries: importance of biomass energy consumption. J Clean Prod 217:603–614
Sharif A, Baris-Tuzemen O, Uzuner G, Ozturk I, Sinha A (2020) Revisiting the role of renewable and non-renewable energy consumption on Turkey’s ecological footprint: evidence from Quantile ARDL approach. Sustain Cities Soc 57:102138
Sinha A, Shahbaz M (2018) Estimation of environmental Kuznets curve for CO2 emission: role of renewable energy generation in India. Renew Energy 119:703–711
Sinha A, Shahbaz M, Balsalobre D (2017) Exploring the relationship between energy usage segregation and environmental degradation in N-11 countries. J Clean Prod 168:1217–1229
Torras M, Boyce JK (1998) Income, inequality, and pollution: a reassessment of the environmental Kuznets curve. Ecol Econ 25:147–160
Udemba EN, Agha CO (2020) Abatement of pollutant emissions in Nigeria: a task before multinational corporations. Environ Sci Pollut Res:1–11
Usman O, Iorember PT, Olanipekun IO (2019) Revisiting the environmental Kuznets curve (EKC) hypothesis in India: the effects of energy consumption and democracy. Environ Sci Pollut Res 26(13):13390–13400
Usman O, Alola AA, Sarkodie SA (2020a) Assessment of the role of renewable energy consumption and trade policy on environmental degradation using innovation accounting: evidence from the US. Renew Energy 150:266–277
Usman A, Ullah S, Ozturk I, Chishti MZ, Zafar SM (2020b) Analysis of asymmetries in the nexus among clean energy and environmental quality in Pakistan. Environ Sci Pollut Res 27(17):20736–20747
Waqih MAI, Bhutto NA, Ghumro NH, Kumar S, Salam MA (2019) Rising environmental degradation and impact of foreign direct investment: an empirical evidence from SAARC region. J Environ Manag 243:472–480. https://doi.org/10.1016/j.jenvman.2019.05.001
World Development Indictors, WDI (2020). https://data.worldbank.org/ Accessed Jan 2021
Zhang J (2021) Environmental Kuznets curve hypothesis on CO2 emissions: evidence for China. J Risk Finan Manag 14(3):93
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Andrew Adewale Alola: Formal analysis, methodology, and corresponding author
Festus Victor Bekun: Conceptualization draft, investigation, and data curation
Bright Akwasi Gyamfi: Writing-original draft
Asiedu Benjamin Ampomah: Writing
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Bekun, F.V., Alola, A.A., Gyamfi, B.A. et al. The environmental aspects of conventional and clean energy policy in sub-Saharan Africa: is N-shaped hypothesis valid?. Environ Sci Pollut Res 28, 66695–66708 (2021). https://doi.org/10.1007/s11356-021-14758-w
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DOI: https://doi.org/10.1007/s11356-021-14758-w