A smart city utilizes digital technologies to enhance performance, reduce costs and resource consumption, and more effectively engage citizens. Key smart sectors include transportation, energy, healthcare, water and waste. An Internet of Things system allows machines and objects to communicate data that can determine their status. Greener buildings will be energy efficient with motion-sensing lights and roof gardens to monitor carbon footprints. Smarter transportation combines car sharing and public transit with mobility-on-demand tools. Smarter healthcare turns data into clinical and business insights for better outcomes. Smart waste, energy and water infrastructure gathers data to effectively manage precious resources. Smart services provide innovative public services through data from urban systems. Building smart cities is crucial for sustainable growth as