All around us, there are plants, animals, and other living things that help keep our world working. Those tall trees towering above us? They help clean the air we breathe. Stinky poop? We use it to grow food! And what about pesky bees? We wouldn't have fruit like cherries without them. In this Pebble Explore series, young readers will learn all about parts of nature we don't think about much--or wish we didn't have to think about--and just how important they really are. With eye-catching photos, quick facts, and beyond-the-book back matter, budding scientists are sure to enjoy exploring more about the NATURE WE NEED.