The newest Level Two picture book in the award-winning Let’s-Read-and-Find-Out series is a fascinating exploration of all the systems a city needs to function.Millions of people live in cities around the world, but have you ever wondered how cities work? All those people need clean water to drink, a safe place to live, and a way to get around the city! How do you take care of all those people’s needs? Your city has a plan for that.Read and find out all about the systems a city has to keep everyone safe, healthy, and happy! Covers water treatment, power, sewage, recycling, transportation.