Cities provide infrastructure and governance to allow millions of people within a specific geographic area to live and work within a multitude of coordinated, civilized patterns.
People and things need to move in, out and within the city. Water needs to arrive; garbage and sewage must go away. Communications must occur at the right time and reach the right people. Energy must be delivered when and where it is needed, and in a form capable of doing the work being demanded of it. All this must happen with the minimum possible waste and harmful effects on the environment, and it must happen safely, at a reasonable price, and equitably.
