Environmental deterioration is a significant and multi-dimensional issue that concerns the modern world. During the last decades, research has been conducted to address this argument, intending to provide holistic policies that drive sustainable development. However, the European Union (EU) should further provoke the complementarity between growth and environmental quality. Recognizing that gender equality must be introduced in Agenda (2030), this paper intends to examine the impact of well-established macroeconomic and socioeconomic variables in existing literature alongside the role of women in governance. More specifically, this study uses panel data analysis to investigate the understanding of the effects of economic growth, renewable energy, human capital, female representation in parliaments, and environmental regulation on carbon dioxide (CO2) emissions in 20 European countries from 2004 to 2018. Empirically, the study employs several econometric tests and approaches. Findings partially confirm the Environmental Kuznets Curve (EKC) hypothesis, while renewable energy and tertiary education enhance sustainability. Environmental regulation is significant for policymakers as it decreases pollution. The role of women in parliaments, which has been scarcely examined in existing literature, appears to be beneficial for the prosperity of EU societies. All empirical findings leave ample room for further discussion among European stakeholders and policymakers, emphasizing the importance of female participation in governance.