From award-winning science writer Seymour Simon comes a brand-new nonfiction photo essay picture book that explores the one thing on Earth we cannot live without: water! Learn all about the water cycle, the effect on our planet of rising ocean temperatures, how essential clean water is around the world, and more! Also includes: * author's note * stunning full-color photographs * glossary * index * additional reading sources Supports the Common Core Learning Standards, Next Generation Science Standards and the Science, Technology, Engineering, and Math (STEM) standards.