Explores how trees evolved, the process by which they use solar energy to convert carbon dioxide & water into food & produce the oxygen that all animal life needs. The author considers the various ways we have viewed trees over the ages, & the equally various ways we have set about destroying them. Finally, he presents the case for preserving them not merely in tree farms, but in natural forests with complex relationships of flora & fauna that we now recognize as critical to our own well-being. He debates the new forestry practices & reforestation efforts intended to save this precious resource. Will planting a tree be enough? Illustrated.