Moderating the effect of globalization on financial development, energy consumption, human capital, and carbon emissions: evidence from G20 countries

The policy debate on the financial development and dynamic of carbon dioxide (CO2) emission is topical. Globalization can affect this relationship by making financial investments in green energy and environment-friendly technology, as environmental sustainability is the primary concern for modern society. This study proposes a newly formulated conceptual framework to explore globalization’s moderating role on exoplanetary variables (financial development, energy consumption, human capital, and gross domestic product) and CO2 emission. We employed Fixed Effect Ordinary Least Squares (FE-OLS), Driscoll–Kraay standard error approach (D–K), and Dumitrescu and Hurlin’s (2012) panel causality test. Our sample of the study comprised full and subsamples of G20 countries (excluding the European Union) from 1986 to 2018. The results indicated that financial development and human capital decreased carbon emissions, while GDP and energy consumption substantially increased carbon emissions during the study time. Further, globalization moderated the positive impact of financial development and human development on carbon emissions. A sustainable environmental agenda is achieved by a stronger financial system, encouraging green finance, and including technical education that improves production efficiency. However, globalization moderated the negative impact of energy consumption and GDP on carbon emission. Besides, we also reported the bidirectional causal relationship of GDP to energy consumption. Our empirical research provides new insights for policymakers and governments to formulate country-based policies to protect environmental quality while achieving sustainable economic goals.