A Comparative Study on the Relations among Sustainability Focused Indexes with REC, CO2, and GDP

Birkan Durmuşoğlu, Ayşe Ayçim Selam, Seniye Ümit Oktay Fırat


Sustainability has become one of the important concepts of countries due to global warming and climate change. In order to assess the sustainability and environmental performance of countries foundations publish sustainability focused indexes which help researchers and governments to position countries according to related indicators. At the same time, there are some variables which provide environmental and economic information; measured per country. The aim of this study is to investigate the relation between six selected sustainability focused indexes (CCPI, EPI, ETI, SSI-HW, SSI-EW, and SSI-ECW) and selected variables namely, REC, CO2, and GDP. In this study, Spearman’s rank correlation is used to identify the strength of an association between sustainability focused indexes and selected variables for 25 countries. It is seen that to REC has a monotonic correlation with ETI and EPI; CO2 emissions has negative correlations with CCPI and SSI-EW as expected; and GDP has positive correlation with all five indexes except CCPI. The results of this study suggest that the increase on renewable energy consumption and the decrease on CO2 emissions are the main factors for environmental performance which are mitigate climate change and global warming.


Sustainability has become one of the important concepts of countries due to global warming and climate change. In order to assess the sustainability and environmental performance of countries foundations publish sustainability focused indexes which help r

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