Trees is a captivating nature series exploring the diverse world of trees. From bonsai to towering redwoods, this series delves into the science of trees with engaging facts covering all of the key topics. Beautifully illustrated with fun bite-size text, it's a wonderful introduction into the world of trees. Accessible to all children, including reluctant or struggling readers. Why Do We Need Them? is one of four nature books in the series of Trees. Find out what they do for the ecosystem, how we need the for the air we breathe and what life would be like if we didn't have them. Beautifully illustrated scenes with accessible text shows different species plus the animals and nature that surrounds them.