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[Display omitted] • This study evaluates energy consumption options in France using dynamic ARDL. • Explores the impact of changes in disaggregated energy consumption on CO 2 emissions. • The results show that nuclear energy can be a real option for France against gas supply cuts. • The KRLS approach validates the robustness of the dynamic ARDL simulations outcomes. The study explores the influences of potential changes in energy consumption on carbon dioxide (CO 2) emissions, focusing on disaggregated energy consumption sources. In this manner, the study considers France as the leading nuclear energy-consuming country in Europe, includes yearly data between 1970 and 2021, and performs the dynamic autoregressive distributed lag (DYNARDL) model. In addition, the Kernel-based regularized least squares (KRLS) is used for robustness check. The results reveal that (i) cointegration exists between the disaggregated energy consumption indicators and CO 2 emissions; (ii) nuclear, natural gas, oil, and coal energy have a statistically significant effect on CO 2 emissions, while renewable energy is not statistically significant; (iii) nuclear power has a decreasing effect on CO 2 emissions; (iv) positive (i.e., increasing) shocks to nuclear reduce CO 2 emissions, even if they are 300 % in the case of counterfactual shocks; (v) any positive (i.e., increasing) shocks to coal have a drastically increasing effect on CO 2 emissions, even if they are 25 % in the case of counterfactual shocks; (vi) the KRLS approach confirms the robustness of the results. Thus, this study suggests that France should continue to rely on nuclear power for electricity generation and that French policymakers should reduce electricity exports to European Union countries to provide an alternative against the Russian natural gas shock by preventing a reduction in energy supply. [ABSTRACT FROM AUTHOR]