Discover why TREES are important to our world in this photo-filled nonfiction book for budding young scientists. Trees are great for shade in the summer. And we use them build our homes. But what else do trees do? A lot! They help keep the air clean. They provide shelter for animals. And they can even help prevent landslides. With eye-catching photos, quick facts, and beyond-the-book back matter, Why Do We Need Trees? will have young researchers and science fans exploring more about the NATURE WE NEED.