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. More Nature We Need: Why Do We Need Bats? Why Do We Need Bees? Why Do We Need Poop? Why Do We Need Rain? Why Do We Need Soil? Part of the Nature We Need series.