This is not an environmental book, even though it is concerned with the environment, nor is it a book to save the world, even though the world is clearly in trouble. Ultimately, "Time's Up " is a book about survival and about ensuring that every individual human has the means to save herself or himself from the global crisis that is unfolding. People know that the climate is changing, species are being removed from the Earth at a rapidly increasing rate, and entire ecosystems are becoming shadows of their former richness; they know, but they do not understand. The global environmental crisis...