The surge in economic and human development has led to increasing concerns about environmental degradation, thus necessitating effective strategies to enhance sustainability and environmental quality. Therefore, this study empirically examines the impact of environmental fiscal policies, environmental technologies, and research and development (R&D) expenditures on achieving environmental sustainability in the G7 countries. Using advanced econometric techniques, including the Cross-Sectionally Augmented Autoregressive Distributed Lags (CS-ARDL) model and the Dynamic Common Correlated Effects (DCCE) approach, the study identifies both short-run and long-run correlations between the aforementioned variables and their impact on greenhouse gas (GHG) emissions. Our findings confirm the inverted U-shaped Kuznets Curve relationship and reinforce the previous literature on the complex dynamics between economic growth and GHG emissions specific to developed countries. The research also supports the effectiveness of well-designed environmental taxes in reducing environmental degradation and GHG emissions, consistent with and extending existing studies in this area. In addition, the study provides empirical evidence of the critical role of environmental technologies and targeted R&D expenditures in improving environmental quality. In terms of policy implications, our research underscores the urgency for policymakers in the G7 countries to fine-tune environmental taxation mechanisms and increase investment in sustainable technological solutions. Specific recommendations include the development of more efficient tax systems that adhere to the polluter-pays principle, as well as financial incentives such as tax credits and subsidies aimed at accelerating green technology adoption and innovation. In doing so, the study seeks to contribute to the broader discourse on environmental policy and sustainable development, providing valuable perspectives for both the academic community and policy actors.

经济和人类发展的激增导致人们越来越关注环境退化，因此需要采取有效的战略来提高可持续性和环境质量。因此，本研究实证检验了七国集团国家环境财政政策、环境技术和研发支出对实现环境可持续性的影响。该研究利用先进的计量经济学技术，包括横截面增强自回归分布式滞后（CS-ARDL）模型和动态共同相关效应（DCCE）方法，确定了上述变量及其影响之间的短期和长期相关性关于温室气体（GHG）排放。我们的研究结果证实了倒U形库兹涅茨曲线关系，并强化了先前关于发达国家经济增长与温室气体排放之间复杂动态关系的文献。该研究还支持精心设计的环境税在减少环境退化和温室气体排放方面的有效性，这与该领域的现有研究一致并扩展了现有研究。此外，该研究还提供了环境技术和有针对性的研发支出在改善环境质量方面的关键作用的经验证据。在政策影响方面，我们的研究强调了七国集团国家政策制定者微调环境税收机制并增加对可持续技术解决方案的投资的紧迫性。具体建议包括制定遵循污染者付费原则的更高效的税收制度，以及旨在加速绿色技术采用和创新的税收抵免和补贴等财政激励措施。在此过程中，该研究旨在促进有关环境政策和可持续发展的更广泛讨论，为学术界和政策参与者提供宝贵的观点。