This study examines the dynamic relationship between the share of nuclear energy, growth in CO2 emissions, and GDP growth for the wealthiest countries of the two continents, Europe and Asia, from 1965 to 2021. The results from the SVAR model show a signi cant positive relationship between GDP growth and the growth of CO2 emissions in the case of all countries in the present study. However, this is important in the values of the coe cients obtained in the case of different countries of both continents. Further, it has been observed that the relationship between the growth of nuclear energy and the growth in CO2 emissions is more complex and varies from country to country. The results specify a strong negative relationship between nuclear energy and CO2 emissions among France, Russia, the United Kingdom, and India. At the same time, there is no signi cant relationship between Germany, Italy, and China. Finally, the result shows no signi cant relationship between the growth in the share of nuclear energy and the GDP growth rate. From the policy perspective, this study suggests that alternative energy sources like nuclear energy are better for creating a healthy environment.