The current study looks at the causes of carbon dioxide (CO2) emissions by considering the implications of Remittances in the presence of economic growth, financial development, and energy consumption in the case of selected four G-20 economies over the period 1990–2019. This study first uses the Dynamic Simulated ARDL model to stimulate, estimate, and plot to predict graphs of negative and positive changes occurring in the variables automatically as well as their short- and long-run relationships. Results of the ARDL bounds-test confirm a long-term relationship among CO2 emissions, remittances, financial development, economic growth and energy consumption. The results of a novel dynamic simulated ARDL disclosed that the financial development is completely connected to CO2 emissions in Mexico and India in long run. On the other hand, results confirm that there is a positive relationship between remittances and CO2 emissions in case Australia, Germany, and India, but only have an insignificant relationship with CO2 emissions in case of Mexico. The result further disclosed that Renewable energy exerts a significant impact on CO2 in Australia, Mexico, India and Germany in the long run while remittances wield a significant impact on CO2 emissions in Australia, Mexico, India. Moreover, the findings concluded that GDP has significant nexus with CO2 in the long-run in case of Australia, Mexico and Germany. This study opens up new visions for the economies of G-20 countries to sustain financial and economic growth by protecting the environment from pollution through its efficient national environmental policy, fiscal policy, and monetary policy.