The first book for young readers that explains sustainable development in easy terms An attention-grabbing primer on mankind"s direct and indirect effects on the natural world, this important book explains how such topics as global trends, economic disparity, and invasive species, among others, have changed the world in which we live. World-renowned photographer Yann Arthus-Bertrand"s spectacular photographs feature fragile environments that are at risk of being lost as well as places that have already seen the devastating effects of human behavior. A poignant overview of the state of the globe, this book encourages readers to understand what is happening in the environment and to take action.