A wavelet coherence analysis: nexus between urbanization and environmental sustainability

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RESEARCH ARTICLE

A wavelet coherence analysis: nexus between urbanization and environmental sustainability Dervis Kirikkaleli 1

&

James Karmoh Sowah Jr 2

Received: 21 April 2020 / Accepted: 13 May 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020

Abstract The present study aims to explore the co-movement between urbanization and environmental sustainability for the period 1950 to 2014 using the wavelet coherence technique within the global framework. The wavelet coherence technique allows us to investigate both the long-run and short-term causal relationships between urbanization and environmental sustainability within the global framework. The findings reveal that (i) wavelet correlation from the global perspectives indicates a significant wavelet relationship between urbanization and environmental sustainability for medium- and long-term horizons; however, the correlations are not significant for the short-term horizons; (ii) significant vulnerabilities in urbanization and environmental sustainability are observed at different periods and different frequency levels; (iii) urbanization has reliable power for explaining environmental sustainability at different periods between 1970 and 2000. Based on our study, we suggest that global urban planners and policymakers should support modern environment-friendly technologies and renewable energies to control global CO2 emissions and pollutions created by industrialization; policy action to fight climate change is as well recommended as evidence supports to compact city theory. Keywords Urbanization . Environment . Environmental sustainability . Wavelet coherence JEL classification F64 . Q53 . Q65 . C32

Introduction From the historical perspectives, humans across the world lived in rural small towns, though, in recent decades, this has shifted dramatically. The ongoing debates on urbanization and environmental sustainability are trending since the era of classical economists, whether urbanization is fundamental detrimental to environmental quality; however, the Responsible editor: Nicholas Apergis * Dervis Kirikkaleli [email protected] James Karmoh Sowah, Jr [email protected] 1

Department of Banking and Finance, Faculty of Economic and Administrative Sciences, European University of Lefke, Lefke, Northern Cyprus, TR-10 Mersin, Turkey

2

Department of Business Administration, Faculty of Economic and Administrative Sciences, European University of Lefke, Lefke, Northern Cyprus, TR-10 Mersin, Turkey

environmental sustainability, attracting the researcher and got importance for the last few decades. It has been widely documented that a contemporary economic activity in the urban areas account for the largest significant portion of migration and urbanization together drives global energy consumption, CO2 emissions upwards, and environmental quality downwards if the current trend continues over time (Apergis and Li 2016). Of particular concern is the role of cities and urbanization process in the shifting population from rural settlements (Weber a