 This paper examines the role of nuclear energy in promoting environmental sustainability in India, focusing on three key indicators, ecological footprint, EF, carbon dioxide emissions, CO2, and load capacity factor, LF. It also considers the influence of gas consumption and other factors on environmental sustainability, using data spanning from 1970 to 2018. The analysis employs autoregressive distributed lag, ARDL, and frequency domain causality, FDCA, methods to evaluate the relationship between the variables. The ARDL results suggest that both the environmental cosmic curve, EKC, and load capacity curve, LCC, hypotheses are valid in the Indian context. Furthermore, the study finds that nuclear energy and human capital contribute positively to environmental quality, while gas consumption and economic growth have a negative impact on it. The study also highlights the increasing effect of the 2008 global financial crisis on environmental sustainability. Additionally, the causality analysis shows that nuclear energy, human capital, gas consumption, and economic growth can be used as predictors of long-term environmental sustainability in India. This article was offered by Tomowa Sunday Adebayo, Ilhan Osterk, Mehmet Aay, and others.