Fossil fuel consumption has witnessed a significant surge in recent decades, resulting in the depletion of nonrenewable energy resources and adverse environmental repercussions. This scenario necessitates addressing the high-energy demands of developing countries’ energy-intensive sectors through an augmentation in renewable energy production capacity. Accordingly, the primary objective of this research is to scrutinize the influence of green finance and natural resource rents on environmental sustainability within the Next Eleven (N-11) countries from 2001 to 2018. To achieve this aim, the study employs several rigorous econometric techniques. Cross-sectional dependency is assessed using second-generation BP-LM, PS-LM, and Pesaran CD tests, while the unit root is examined using CIPS and CADF tests. Moreover, panel cointegration is assessed employing the Westerlund and Edgerton (2008) cointegration test. The most reliable Cup-FM and Cup-BC panel data estimators are utilized to ascertain long-run parameters precisely. The empirical findings of this research reveal that green financing contributes to a substantial reduction in carbon emissions. In contrast, natural resource rents exhibit detrimental effects on environmental sustainability. Consequently, the study advocates for the implementation of green strategies and policies to bolster green financing investments and regulate natural resource extraction. By doing so, the N-11 countries can work towards accomplishing their environmental sustainability objectives.