A lot of solid, scientific information, presented in very readable, comprehendible text, and illustrated with beautiful paintings.  It discusses the inter-connectedness of living things on planet earth, the fragility “The Real World Wide Web,” problems that come from introducing non-native species into new areas, or from over-harvesting, or from climate change.  It presents a variety of arguments for the importance of preserving biodiversity, describes efforts underway to keep the earth healthy, and offers suggestions for how individuals (even kids) can make a difference.