Part of the Big Ideas That Changed the World graphic novel series, award-winning author-illustrator Don Brown explores the history of dealing with poop, pee, and dirty hands in Keep It Clean! In 1895, an engineer named George Waring was appointed New York City's first commissioner of street cleaning. His task? To make a city with millions of people livable. Narrated by Waring, Keep It Clean! explores the concept of public health, which means ensuring clean water and adequate sewage disposal for everyone, and covers topics such as personal hygiene, sewer systems, and chemical water treatment. Acclaimed author-illustrator Don Brown takes readers on a journey through history and around the world, from Greek, Roman, and Aztec aqueducts and the dawn of bathing (including social public bathing in Japan and religious bathing ceremonies in Machu Picchu) to the invention of soap in the Middle East, the first use of flush toilets approximately 4,000 years ago, and the first toilets used in outer
