How do people live and survive in a big city? How do they get electricity, clean water, and garbage collection? "Your city has a plan for that." This picture book illustrates how people get clean water, power their homes, traverse the roads safely and other needs to make city life comfortable. Descriptions of the different systems such as sewage treatment and power plants will intrigue children although their more concrete thinking may generate more questions about how things work. Cartoon-like illustrations have plenty of little details for examining. Kids (and even adults) will come away with a greater understanding of all it takes to make a city livable. ( )