Discover why dirt is an important resource in this photo-filled nonfiction book for budding young scientists. What's so great about dirt? A lot, actually! In this Pebble Explore book, discover how this often overlooked - or even annoying - part of nature is essential to our world. We need dirt to grow crops and construct buildings and roads. Dirt is even important to the air we breathe! -- Provided by publisher.

Help underfoot -- All about soil -- How does soil help us -- Threats to soil -- A world without soil.