Most of us see trees every day, and too often we take them for granted. Trees provide us with everything from food, fuel and shelter to oxygen and filtered water. "Deep Roots" celebrates the central role trees play in our lives, no matter where we live. Each chapter in "Deep Roots" focuses on a basic element--water, air, fire and earth--and explores the many ways in which we need trees to keep our planet healthy and livable. From making rain to producing fruit to feeding fish, trees play an integral role in maintaining vibrant ecosystems all over the world. Facts about trees and hands-on activities throughout help readers discover ways to get to know our giant neighbors better.