*4.3. Ranking Countries*

Based on the scores shown in Table 2, this study gives in Table 3 the position of each of country in every year.


**Table 3.** Raking countries during the period from 2008 to 2017.

As shown in Table 3, five countries including United Kingdom, Norway, United States, Nigeria, and Kuwait are always at the first position for the whole term. Germany with the first ranking is in 2008, 2009, 2010, 2011, 2013, and 2014. Italy only obtains the first ranking in 2009. The Netherlands is mostly in the first position except for 2015. Portugal obtains first ranking from 2008 to 2016 and it is down to the ninth. Colombia gets the first ranking for three years as 2011, 2012, 2013. Japan attained first position during the period from 2009–2014. Australia is in the first ranking from 2010 to 2015, and in 2017. New Zealand reaches the first position except for 2008. Algeria approaches the first ranking in three years from 2008 to 2011. The remaining terms of Germany, Italy, Netherlands, Portugal, Colombia, Japan, Australia, New Zealand, Algeria, are ranked from 9 to 27. Belgium, Czech Republic, France, Poland, Romania, Spain, Sweden, Turkey, Kazakhstan, Russia, Ukraine, Uzbekistan, Canada, Argentina, Brazil, Chile, Mexico, China, India, Indonesia, Malaysia, South Korea, Thailand, Egypt, South Africa, Iran, Saudi Arabia, and United Arab Emirates stay at the low position without reaching the first position during whole term. Especially, India rank at the bottom position consecutively during the period of 2008–2017 except for 2010 where it raised one level with a ranking as forty-first. Ukraine has the last ranking in 2010.

The above description specifies the ranking of an effect level in electrical energy sources. Increased population, simultaneously industrialization, and modernization all represent an important force that has an impact on accreting emissions. Therefore, the number of efficient countries with first contemporaneous ranking are reduced, from 2009 to 2017 down from 12 to eight countries. Furthermore, many countries such as the Czech Republic, Turkey, Kazakhstan, i.e., have ye<sup>t</sup> to reach first position and thus face a downward trend. On the contrary, the United Kingdom, Norway, United States, Nigeria, and Kuwait maintain a sustainable economy and always stand at the highest ranking.
