By 2050, urban populations will be the majority of the planet's population, thus civilizations must construct cities that can handle both present-day and future needs. Information and communication technologies have given a common thing intelligence to improve human comfort. Smart/sustainable city initiatives have succeeded and failed. The study identifies relevant scholars, models, frameworks, and tools. This research uses a qualitative technique to analyze “smart city” and “sustainability” and encourage the sustainable growth of smart cities. Smart city applications need green Internet of Things (IoT). It's important to address methods and regulations for reducing pollution, waste management, traffic, resource utilization, and energy consumption, as well as assuring public safety, a good standard of life, environmental sustainability, and cost management. This study analyzes ways to make cities smarter, more sustainable, and greener. The chapter highlights IoT's ability to connect with other potential sectors to suit smart city goals. We discuss future smart city research challenges and opportunities.
Green Blockchain Technology for Sustainable Smart Cities, 2023, Pages 29-63,