Cambridge Discovery Education Interactive Readers are the next generation of graded readers - captivating topics, high-impact video, and interactive exercises designed to motivate and engage. Water has powered industry for ages, helping to drive industrial growth. However, the awesome power of water can have some very negative consequences. Floods, tsunamis, and erosion all threaten our partnership with water. Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Plus, download a free e-book version of the reader!