“…For this particular environmental measure, an EKC was corroborated in the studies of Holtz-Eakin and Selden (1995), Galeotti and Lanza (1999), Heil and Selden (2001), Cole (2004), Galeotti et al (2006), andParajuli et al (2019), among others, in contradiction with the results obtained in Shafik and Bandyopadhyay (1992), Galeotti and Lanza (2001), York et al (2003), and Nutakor et al (2020), for example. Other researches such as Sengupta (1996) and Martinez-Zarzoso and Bengochea-Morancho (2004) find a cubic N-shaped relationship, whereas Barra and Zotti (2018) points out that preliminary evidence validates the Kuznets's hypothesis, although this relationship turned out to be misleading once the issue of (non)-stationarity has been taking into account.…”