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Among the EU countries, Greece relies heavily on coal the most, and it has lagged behind in cutting emissions. Further, following the oil crisis of the 1970s, Greece has strategically invested in lignite. Solid fossil fuels such as lignite are classified as fossil fuels that are detrimental to environmental performance. This continued burning of fossil fuels has emerged as one of the most serious concerns in Greece, even globally. The aim is to capture the effect of energy productivity on carbon dioxide emissions (CO2E) in Greece while controlling trade openness, energy consumption, and economic growth. Toward this end, we employ a nonlinear autoregressive distributed lag (NARDL) model and other econometric robust techniques. The findings of the study are as follows: (i) trade openness positively impacts carbon emissions growth; (ii) economic growth adds to increased CO2E; (iii) expanding energy productivity is beneficial to the environment as it causes CO2E to decline; and (iv) increase in energy consumptions further results in CO2 cutbacks. The recommendation of our study suggests some innovative policies to counter the detrimental effects of carbon emissions by an increase in energy efficiency for the Greek economy. The study recommends that embracing a low-carbon, resource-efficient, and circular economy is of paramount importance to Greece in order to ensure environmental protection, as well as to boost green growth, create new jobs, and combat unemployment. Greece should ensure that energy efficiency techniques are promoted, and renewable energy sources are expanded in order to increase the options for cleaner alternatives and reduce greenhouse gas emissions, thus preserving the environment. [ABSTRACT FROM AUTHOR]