Environmental sustainability is a worldwide issue. By the utilization of advanced digital technologies, all governments are suggested to address this challenge for offering better e-Governance administration. The digital technologies play a vital role in providing e-Governance services. Digitalization of services is foundation of green e-Governance. The need for paper-based procedures can be disposed of by the e-Governance platforms, and also minimizing paper consumption and deforestation. Online applications for licenses, tax payments, and public service access reduce in-person travel and therefore lower carbon emissions. Investing in energy-efficient software and technology may be a top priority for governments. To computerize and optimization of governments’ activities and to provide better e-services to the public, digital technologies can be used. Big Data, Cloud computing, the IoT (Internet of Things), Artificial Intelligence, wired and wireless networks, and sensor technologies have all advanced technologically, enabling the advancement of active design tools that let citizens participate in e-Governance services that address environmental sustainability. By integrating smart devices into our surroundings and opening the chance for creative applications of ICT used in smart cities, energy efficiency, and home automation, IoT provides many resolutions for our daily lives and for the development of society. Information and Communication Technology & urban advancement have drawn a huge attention to smart cities. In 6 (six) areas— smart environment, smart governance, smart living smart economics, smart people, smart transportation—the smart city idea might be used as a successful, effective, & efficient way to advance the lives of citizens.