Greg Roza 
How Do Sewers Work? [PDF ebook] 

Sewers might be a gross subject to study, but they also offer the perfect chance to comprehend important STEM skills and topics. Readers are sure to enjoy learning about sewers throughout the centuries-from the systems of the ancient Roman Empire to those in our very own neighborhoods. This volume addresses important scientists, engineers, and inventors who have made the unsavory job of removing waste from our lives a reality. Diagrams and photographs of sewer systems from the ancient world and those of today will help readers grasp the scientific concepts behind them. This book was designed with social studies and science curricula in mind, and focuses on essential curricular topics.