Earth has a water problem. People need water to live. But only a little of Earth's water is usable. How can you help? Join Trina to find out how to care for Earth's water. Do your part to be a planet protector Discover how to reduce, reuse, recycle, and more with Tyler and Trina in the Planet Protectors series, part of the Cloverleaf Books collection. These nonfiction picture books feature kid-friendly text and illustrations to make learning fun