Effect of renewable energy consumption on environmental quality in sub-Saharan African countries: evidence from defactored instrumental variables method

Abstract

PurposeSub-Saharan Africa is a region that is highly vulnerable to the effects of climate change. Renewable energy consumption could play a major role in mitigating the effects of climate change by improving environmental quality in the region. The purpose of this paper is to examine the effect of renewable energy consumption on environmental quality in sub-Saharan African countries.Design/methodology/approachThe empirical investigation is based on the estimation of an augmented Green Solow model through the defactored instrumental variables approach on a sample of 34 countries over the period 1996 to 2018.FindingsThe results of two-stage defactored instrumental variables estimator show that renewable energy consumption improves environmental quality. Indeed, renewable energies have a significant negative influence on CO2 emissions. This result is robust when using the ecological footprint as an indicator of environmental quality.Practical implicationsIn terms of implications, governments in Sub-Saharan Africa need to pursue policies to encourage investment in the renewable energy sector. This will promote renewable energy consumption, change the structure of the energy mix in favour of renewable energy, improve environmental quality and effectively combat climate change.Originality/valueThe originality of this research in relation to the existing literature lies at several levels. Firstly, the analysis is carried out using a unified framework combining the environmental Kuznets curve and the environmental convergence hypotheses. Secondly, this research uses a very recent econometric method. Finally, environmental quality is measured using two indicators.

Renewable energy and ecological footprint nexus: Evidence from dynamic panel threshold technique

“…These findings support the nonlinear relationship between EF and RE through IQI and PDN threshold effects. While prior studies conducted by Naimoglu [ 135 ], Mohammad et al [ 136 ], Sinha and Shahbaz [ 137 ], Sugiawan and Managi [ 138 ], Destek and Sinha [ 20 ], Danish and Ulucak [ 139 ], Alola et al [ 140 ], Qiao et al [ 141 ], Adamas and Nsiah [ 142 ], Diallo [ 143 ], and Sharma et al [ 17 ] have primarily on direct and unconditional effects, they have also supported similar effects of RE on environmental degradation. Furthermore, other variables retain similar signs of the coefficients with highly identical effects on EF in models 3 and 4.…”