The main intention of the study is to investigate the trade openness, economic development and greenhouse gases which make their influence on environmental quality regarding G-7 countries. The study employed the Panel Ordinary Least Squares (POLS), Grangers causality test and panel ARDL model for data analysis. This study analyzes the robustness of Environmental Kuznets curve (EKC) hypothesis by investigating the extent to which trade openness whose have their influence on quality of environment through various environmental indicators for the period of 1970 to 2018. On the basis of empirical findings, there is long-run association exist among GHG emissions and economic development of G-7 economies. The estimated consequences present that GDP exists in bidirectional causality with the combination of green finance in long-run. Meanwhile, there is unidirectional association exist among GDP and energy consumption. This study found that trade openness among these seven economies increased the environmental degradation and disturb the environmental quality. Various safety measures are adopted to control the environment and make over the different agreements among G-7 economies to increase the trade openness and control the GHG emissions. This has shown significant effects for maximizing the GDP wealth of G-7 economies. There is a significant association exist between trade and environmental degradation with respect to these seven countries. The consequences reveal the positive relationship of trade openness with N2O and environmental quality while the positive association with the ecological footprint in overall G-7 economies. The findings make sure the inverted U-shaped EKC exists in all economies when N2O and ecological footprint are used as environmental indicators. However, this U-shaped EKC exist in all G-7 countries who have acme income level when greenhouse gases indicators are applied for the evaluation. Eventually, it recommended, if G-7 countries continue trade openness policies with energy sector reforms and maintains sustainable use of bio- capacity, then they will be able to combat environment issues with increase their development. This might increase more GDP of these economies which make stronger and development in long-run. In such a way, more financial development take over these economies make beneficial.
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