Throughout the world's oceans, the tides are always in motion. In this book, learn how scientists harness this motion to generate clean electricity, discover where ocean energy is being used today, and explore what the future of this technology may hold. Easy-to-read text, vivid images, and helpful back matter give readers a clear look at this subject. Features include a table of contents, infographics, a glossary, additional resources, and an index. Aligned to Common Core Standards and correlated to state standards.