This study explores the potential of e-governance as a tool for enhancing environmental sustainability in Nigeria, focusing on the opportunities it presents and the challenges that hinder its full implementation. Environmental degradation remains a critical issue in Nigeria, driven by deforestation, pollution, poor waste management, and the impacts of climate change. E-governance, with its ability to streamline processes, enhance transparency, and foster public participation, presents a viable solution for improving environmental management. This research examines how digital technologies can be leveraged to address these environmental challenges, such as through real-time monitoring systems, data analytics, and public engagement platforms. Furthermore, it identifies key barriers to the successful implementation of e-governance in Nigeria, including inadequate infrastructure, limited digital literacy, and weak policy enforcement. The study also proposes strategies to overcome these challenges, emphasizing the need for strengthened governance structures, investment in digital infrastructures, capacity building, and fostering international collaborations. The findings highlight the importance of a multi-stakeholder approach, involving government agencies, private sectors, and local communities, to achieve sustainable environmental outcomes. This study contributes to the growing body of knowledge on the intersection of e-governance and environmental sustainability, with particular relevance to developing nations like Nigeria.