Abstract:

Recently, there has been a significant increase in greenhouse gas emissions, and therefore the environmental pollution problem has become a global problem. The biggest share in greenhouse gas emissions is carbon dioxide emission. The purpose of this study is to examine the relationship between CO2 emissions, climate policy uncertainty index, energy consumption, and economic growth by sectors in the 2000M1-2021M11 period of the USA. In this context, asymmetric causality and time-varying causality methods are used in the study. According to the findings, it is seen that the asymmetric causality relationship between the climate policy uncertainty, CO2 emissions, and energy consumption varies according to the sectors. According to the time-varying causality analysis results, we can say that there is a relationship between climate policy uncertainty and other variables in all sectors, and for this reason, CO2 emissions in electricity, residential, industrial, and commercial sectors are an important variable in terms of energy consumption in the USA. Therefore, policymakers and practitioners need to implement policies to reduce climate policy uncertainty in order to reduce environmental problems.

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