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The escalating levels of CO2 emissions from the transportation sector have been observed to exert deleterious effects on human well‐being and environmental sustainability. To mitigate these emissions, it is imperative to consider the potential contributions of environmental policies and financial innovation. Thus, this study examines the effects of financial innovation and environmental policy (environmental tax–environmental technology) on transport‐related CO2 emission (TCO2E) for BICS (i.e., Brazil, India, China and South Africa), which are characterized by substantial industrialization, rising TCO2E and growing environmental concerns. The analysis is complemented by including control variables, notably economic growth and the transition to cleaner energy, to offer a nuanced and holistic perspective on the dynamics governing this critical subject matter. The research adopts a novel econometric approach cross‐sectionally augmented auto‐regressive distributed lags for benchmark estimation and fully modified ordinary least squares–dynamic ordinary least squares for robustness analysis from 2000/Q1‐2018/Q4. The findings revealed that financial innovation and economic growth bolster TCO2E and decrease environmental quality in the region. In contrast, environmental tax, environmental innovation and energy transition decrease TCO2E. Based on findings, policy suggestions relating to implementing a carbon tax, promoting green financial innovation and others are discussed to decrease TCO2E. [ABSTRACT FROM AUTHOR]

South Africa, one of the emerging markets and fast-developing economies in Sub-Saharan Africa recognised for varying world's natural assets on the international market, has recorded significant economic growth in the previous several years. However, aside from the ecological repercussions of energy generation, how economic uncertainties moderate the effects of energy intensity, renewable and non-renewable energy usage, and economic complexity on the environment has largely gone unnoticed. As a result, this paper addresses an important empirical vacuum by exploring the moderating influence of economic policy uncertainty in the environmental Kuznets curve for South Africa from 1960 to 2020. Results from the novel dynamic autoregressive distributed lag simulations framework reveal the following key findings: (i) economic policy uncertainty accelerates environmental degradation in both the short and long run; (ii) economic growth (as measured by the scale effect) increases environmental degradation, whereas the square of economic growth (as measured by the technique effect) slows it down, confirming the presence of the environmental Kuznets curve (EKC) hypothesis; (iii) environmental quality is deteriorated by energy intensity, economic complexity, non-renewable energy usage, and trade openness; (iv) the use of renewable energy and technological innovation increase environmental quality; (v) whereas the moderating effects of economic policy uncertainty on the environmental impacts of energy intensity, renewable and non-renewable energy consumption result in an increase in environmental destruction, its moderating effect on environmental implication of economic complexity plays an important role in improving environmental quality. These findings permit us to draw important policy recommendations for South Africa for improving environmental quality. [ABSTRACT FROM AUTHOR]